So I went to the RHG battle section and there were a lot of battles using Filize, or however you spell that website. Sometimes when I click the battle, the tab just says "by" and says the page doesn't exist. does anybody know what's going on?

It's because filize sucks. The link will break whenever their servers "go down"

Sometimes the battles are a while ago. The site had this "reset" or something of the other a while ago and a bunch of things got wiped. Pissed me off, and I switched to sta.sh.
I suggest you don't use fileize either.