I have imported vb3.8 to xenforo on a test forum but there seem to be some inconsistencies.
For starters, I have 12,400(ish) members. In the admin panel, this figure is correct, but in the forum stats on the right hand side it says I have 9,900 members.
In addition to this, the post count is showing as higher(by a few hundred) in the xenforo forum stats than what they were in vbulletin.
Finally, I have a private moderators forum which is entirely bare of all content.
Any obvious things to try?