Arrow keys get re-enabled when opening other files

I have disabled the arrow keys in my .vimrc as follow:

    nnoremap <buffer> <Left> <Esc>
    nnoremap <buffer> <Right> <Esc>
    nnoremap <buffer> <Up> <Esc>
    nnoremap <buffer> <Down> <Esc>
    nnoremap <buffer> <PageUp> <Esc>
    nnoremap <buffer> <PageDown> <Esc>

However, when I open a second file using `:vs some_file.py` or `:edit some_file.py`, the arrow key get reactivated for that file. Is that considered as normal behavior?

Thanks

--
--
You received this message from the "vim_use" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php

---
You received this message because you are subscribed to the Google Groups "vim_use" group.
To unsubscribe from this group and stop receiving emails from it, send an email to vim_use+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.