Super cache strings…what are they?

I have 2 pages that I don’t wish to be cached. They are:-
….com/bradys-blog
….com/gb2-3

For the latter I have put /gb2-3/ into the excluded files and yet according to the page source code the page is still being cached.

What to do

http://ww.wp.xz.cn/extend/plugins/wp-super-cache/