Wait, why is IFM not in continuity?
That's unclear. All we really know is that Dave was told to disregard it when writing his current trilogy -- which I think has been blown out of proportion, since, based on my conversations with Dave, I think that applied specifically to reconciling his plans for Geordi with what IFM established about Geordi and Leah Brahms. I know he was planning on finding a way to reconcile them, but apparently the editor said not to bother explaining the change.
Although there are a couple of things about IFM that are hard to reconcile with other books -- mainly that the Titan
novels have Alyssa Ogawa on Titan
as a nurse just months before she's seen on Challenger
as a doctor.