Today during my import of a vB4 database everything was successful, however it doubled everybodys post count. Just wondering how to fix this small issue instead of manually going through everyone that matters.
I have seen this problem result from running an import twice on the same installation of xenForo. I recommend you install a new copy of xenForo when you want to run the final import, as opposed to building onto your test installation. That way you avoid duplicate content. The test installation should be used as a point of reference when doing the final import.
With that said, this person had the same problem. Brogan managed to manually correct the post counts by generating a list of queries. If you contact Brogan then he might be able to do the same for you.