So I was wondering, I clicked 'Claim Retroactive Titles' and it says given. But where are my titles now?

I was wondering the same thing. :

If you go on to edit forum options then it should be somewhere round there so you can change them instead of e.g silly spamming sausage

Click on Prefs up top first, then that will show Forum Options as a choice, then click on that, which will bring up Change title. :)