Missing first posts
 

I had done several successful test runs of a Drupal to vB forum import.
With this under my belt, I shut down the Drupal forum and did it for real.

I had requested (and received confirmation) that all my Mods would arrive at a given time for testing before vB went live... needless to say only one turned up... my one and only Mod surfed around looking for issues whilst I was doing the last of the tidy up... all initially appeared to be good, so we went live.

Now that we've been up for a few days, we're finding some threads that are missing the first post.

Whilst I still have Impex in place, with its id's, some of the threads have since been moved between forums, and plenty of new posts added.

What would be the best game plan for recovering the missing posts, with least interruption to the members?