When i open a file from nerdtree or vimfiler, the file is opening in left slipt screen and nerdtree/vimfiler jumps to right split screen..i got this problem after replacing vundle with neobundle eventhough neobundle has nothing to do with nerdtree/vimfiler..here is my vimrc file https://github.com/rajanand02/dotfiles/blob/master/.vimrc
vim before opening a file
vim after opening a file from startify or from vimfiler/nerdtree
these are the settings releated to nerdtree/vimfiler
autocmd VimEnter * NERDTree
autocmd VimEnter * NERDTreeTabsOpen
autocmd VimEnter * NERDTreeMirror
autocmd VimEnter * wincmd p
let g:vimfiler_as_default_explorer = 1
autocmd VimEnter * VimFilerExplorer
autocmd VimEnter * wincmd p