After ironing out a few initial problems with an upgrade from Newbb1 to Newbb_2.02 (I had template problems similar to this) I thought all was well, until I noticed that some topics were missing from the forums. It seems strange that it still displays a list of some topics, but not the complete set as per the quantity shown in the Newbb index page. I've tried re-syncing the forums in the admin section with no luck.

I'm confused as to why this is the case, can anyone offer any pointers?