TRY THIS!

after it says "Your cookie has been reset. You are now acting as..." etc., go to the main page & hit RELOAD...not "refresh". This tells your browser not to look at the page in your cache, but to get a new copy. 'Refresh' uses the same copy/cookie that did NOT know you.

I have to do this now & then, and usually, that is all it takes.

All the parts about clearing the cache...etc.. are relevant, but may be the long way around.