Strange behavior after insert some shortcuts...

Hello guys,
I'm trying to add some shortcuts to my vimrc file, but a weird behavior is happening:

When i use the new shortcuts, the vim moves the cursor automatically, it's a very strange!

I'm sending my "good" vimrc: http://pastebin.com/aCKJD4a2

Here the new shortcuts that I want insert:

nnoremap <CR> G
nnoremap <BS> gg
nnoremap <leader>x :x<CR>
nnoremap <leader>w :w<CR>

I put at in the final of the file...

I followed the recommendation of this blog: http://sheerun.net/2014/03/21/how-to-boost-your-vim-productivity/

Thanks!

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