If it is a FICO based score (the only ones that a lender would see), YES, the score changes while items are being disputed. FICO assumes that any disputed items will be deleted from the credit file and models the score accordingly. Other scoring systems may or may not change. You did not state the source of the 650 example.
TU is in the scope---638 EqFx is catching up fast was 585 could be in 600 already (it is now clean I had a creditor reporting past due amount since 95 that was paid in full) Ex is somewhere in that range. I ain't paying to see.
