I see several things that don't look right when I look at your prosilver code.
I would suggest that you delete prosilver from the ftp and upload a new copy.
also, in your admin panel, on the general tab, on the left menu at the bottom, find load settings and click on it.
on that page find the recompile stale style components and set it to yes.
then on the main page again, purge the cache.
now, any edits you make should show up instantly with onlly a page refresh.
however, there is still some type of cache going on because the word hey is nowhere in the header or the navbar html code yet there it is along with the hellohello etc. etc. at the top.
also, when I access your board, the page with no styling shows up for a second before the css actually loads. that should not happen.
I am available for custom work on a donation basis. Please send me a PM with your needs.
Premium phpBB 3.2 Styles
OK, so what's the speed of dark?