Vim documentation index.txt using word "buffer" for the word "register"

Dear All, I'm preparing a presentation of Vim's essentials hence I'm extensively browsing through Vim's documentation. Unless I'm mistaken it seems that in the index.txt file the word 'buffer' is quite often used in lieu of 'register'. I found this by chance while I was looking for the word 'bu

Vim's documentation (help files) - Some incomprehensible jumps

Dear All, Using Vim's documentation quite intensely I found some perplexing behavior of tags within the help files, both on Gvim 8.0 (Win 7) and vim 7.4 (Ubuntu 16.04). Note: the tags files for Gvim 8.0 and vim 7.4 are respectively: C:\Program Files (x86)\Vim\vim80\doc\tags /usr/share/vi