Would it be worth comparing postbit templates too? Just in case there's something missing from your template Floren that is stopping the title being removed.
At least I know is not a bug. What postbit template should I post?
I'm pretty sure is not an issue... the only template I have customized is the footer, to add the {year}. The rest is 100% stock.
Not familiar with the procedure, I presume you don't refer to building a specific cache.
One thing's sure, if I change an user title or disable the Staff banner globally, it updates properly.