VIM python filetype specific indent fails after 50 lines of one list

I'm currently working on reformatting a python project to follow the 4 spaces indent style. The project is being done in VIM with the following plugins: fugitive, snipmate, surround, git, supertab, minibufexpl, command-t. pyflakes-pathogen, ack, gundo, pydoc, pep8, py.test, makegreen, tasklist, nerdtree, ropevim .

My .vimrc is currently:

set tabstop=4
set shiftwidth=4
set expandtab

let mapleader=","

filetype off

call pathogen#runtime_append_all_bundles()
call pathogen#helptags()


set foldmethod=indent
set foldlevel=99

map <leader>td <Plug>TaskList
map <leader>g :GundoToggle<CR>

syntax on
filetype on
filetype plugin indent on

let g:pyflakes_use_quickfix = 0

let g:pep8_map='<leader>8'

au FileType python set omnifunc=pythoncomplete#Complete
let g:SuperTabDefaultCompletionType = "context"

set completeopt=menuone,longest,preview

The project is not mine, and I would like to keep the code functionally untouched from the original.

The code consists of a few assignment operations. The left side of each is the variable name, the right side is a very, very long list with multiple nested lists.

If I attempted to utilize VIM's re-indent functionality "gg=G" or even "100==" from the start of the asignment, VIM will properly indent the first fifty lines of the right side of the asignment. However after the fiftieth line of the right side, VIM begins indenting the second level an additional four spaces.

animations = [
        ["stand", 0, amf_client_prediction,
            #   [3.0, "myanim", 0, 50, arf_cyclic|arf_loop_pos_0_25],
            [3.0, "anim_human", 50, 52, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.25],
            [3.0, "anim_human", 60, 62, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.75],
            [3.0, "anim_human", 70, 72, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.25],
            [3.0, "anim_human", 80, 82, arf_use_stand_progress|arf_cyclic|arf_two_handed_blade, 0, (0, 0, 0), 0.5],
            ##   [35.0, "stand_woman", 0, 1059, arf_use_stand_progress|arf_cyclic|arf_two_handed_blade, 0, (0, 0, 0), 0.5],
            ##   [43.0, "stand_woman_public", 0, 1313, arf_use_stand_progress|arf_cyclic|arf_two_handed_blade, 0, (0, 0, 0), 0.5],
            #  [35.0, "tavern_stand", 0, 472, arf_cyclic|arf_loop_pos_0_25],
            ],
        ["stand_man", 0, amf_client_prediction,
            [11.0, "stand_man", 0, 315, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.25],
            ],
        ["stand_player_first_person", 0, amf_client_prediction,
            [3.5, "anim_human", 90, 100, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.25],
            [3.5, "anim_human", 110, 120, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.25],
            ],
        ["jump", acf_enforce_lowerbody, amf_priority_jump|amf_play|amf_client_prediction|amf_continue_to_next,
            ##   [1.09, "jump", 22, 48, arf_blend_in_1],
            [1.0, "jump", 22, 46, arf_blend_in_1],
            ##   [0.8, "anim_human", 270, 272, arf_blend_in_4],
            ],
        ["jump_loop", acf_enforce_lowerbody, amf_priority_jump|amf_play|amf_client_prediction,
            ##   [0.8, "jump_loop", 0, 30, arf_blend_in_2|arf_cyclic],
            [0.5, "jump_loop", 0, 14, arf_blend_in_3|arf_cyclic],
            ],
        ["jump_end", acf_enforce_lowerbody, amf_priority_jump_end|amf_play|amf_client_prediction,
            ##   [0.1, "jump", 48, 55, arf_blend_in_1],
            [0.3, "jump", 48, 55, arf_blend_in_2],
            ],
        ["jump_end_hard", acf_enforce_lowerbody, amf_priority_jump_end|amf_play|amf_client_prediction,
            ##   [0.8, "jump_end_hard", 29, 54, arf_blend_in_1],
            [0.6, "jump_end_hard", 36, 54, arf_blend_in_1],
            ],
        ["stand_unarmed", 0, amf_client_prediction,
            [8, "noweapon_cstance", 0, 100, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.25],
            ],
        ["stand_single", 0, amf_client_prediction,
            [9.0, "sword_loop01", 0, 200, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.25],
            ],
        ["stand_greatsword", 0, amf_client_prediction,
            [6.0, "greatsword_cstance", 0, 91, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.25],  
            ],
        ["stand_staff", 0, amf_client_prediction,
            [2.0, "staff_cstance", 0, 60, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.0],  
            ],
        ["stand_crossbow", 0, amf_client_prediction,
            [2.0, "staff_cstance", 0, 60, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.0],  
            ],
        ["turn_right", acf_enforce_lowerbody, amf_play|amf_client_prediction,
                [0.95, "stand_man", 0, 30, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.25], #TODO
                ],
        ["turn_left", acf_enforce_lowerbody, amf_play|amf_client_prediction,
                [0.95, "stand_man", 0, 30, arf_use_stand_progress|arf_cyclic, 0, (0, 0, 0), 0.25], #TODO
                ],
        ["turn_right_single", acf_enforce_lowerbody, amf_play|amf_client_prediction,
                [0.95, "turn_man_onehanded", 0, 23, arf_cyclic|blend_in_walk|arf_make_walk_sound,pack2f(0.4,0.9), (0, 0, 0), 0.0],
                ],
        ["turn_left_single", acf_enforce_lowerbody, amf_play|amf_client_prediction,
                [0.95, "turn_man_onehanded", 30, 53, arf_cyclic|blend_in_walk|arf_make_walk_sound,pack2f(0.4,0.9), (0, 0, 0), 0.0],
                ],
        ["turn_right_staff", acf_enforce_lowerbody, amf_play|amf_client_prediction,
                [0.95, "turn_man_staff", 0, 20, arf_cyclic|blend_in_walk|arf_make_walk_sound,pack2f(0.4,0.9), (0, 0, 0), 0.0],
                ],
        ["turn_left_staff", acf_enforce_lowerbody, amf_play|amf_client_prediction,
                [0.95, "turn_man_staff", 30, 50, arf_cyclic|blend_in_walk|arf_make_walk_sound,pack2f(0.4,0.9), (0, 0, 0), 0.0],
                ],
        ["turn_right_greatsword", acf_enforce_lowerbody, amf_play|amf_client_prediction,
                [0.95, "turn_man_greatsword", 0, 20, arf_cyclic|blend_in_walk|arf_make_walk_sound,pack2f(0.4,0.9), (0, 0, 0), 0.0],
                ],
        ["turn_left_greatsword", acf_enforce_lowerbody, amf_play|amf_client_prediction,
                [0.95, "turn_man_greatsword", 30, 50, arf_cyclic|blend_in_walk|arf_make_walk_sound,pack2f(0.4,0.9), (0, 0, 0), 0.0],
                ],
        ["prepare_kick_0", acf_enforce_lowerbody, amf_priority_kick|amf_play|amf_client_prediction|amf_continue_to_next,
                [0.05, "kick_rightleg", 10, 12, arf_blend_in_3],
                ],

Does VIM utilize some sort of a buffer that sets a maximum number of lines that will be tracked for indentations? If so, is there any way to increase this buffer size?

Otherwise, if this is simply a fault of the built-in indentation logic, do more robust third-party solutions exists that can provide indentation functionality for such a specific case?

If more information is necessary, I will update.