import with impex: half the posts and threads are missing?

[irrimiri]

Hello,

I have imported a phpbb 3.0.0 forum into the latest vBulletin board with impex tonight.
All went well, and I updated the counters and such, and all seems to work, but with a closer look I noticed that most of the threads and posts are missing when you go check them.

The weird thing is that, on the main page of the forum, you can actually see how many posts, views etc. every subfora contains, and the stats are correct according to the old forum it was imported from. So they ARE counted, but they are not all showing?
If you enter one of the subfora, then you can only see (for example) about 5 of the most recent threads, and all the older threads and posts seem to have vanished.

I could see that the update was complete, but I cannot find a solution for this problem. I want the forum to show ALL the threads and comments that were uploaded.
I re-run the counters, but the issue stays.

Is there anyone familiar with this problem? And is there an answer for this? I couldn't find it when searching through this forum.
I would like to have the forum complete before it goes live again.

Thanks in advance!!!

Kind Regards,
Robin