One of the cars I got from original owner after 1/31/17 so unless he forged documents, it should be denied.
Another car was traded in to a dealer after the fact, so again, unless they forge documents, should get denied. UNLESS it was traded in earlier and carfax is wrong.
Another car I have had a previous owner until 2016 then sold to 3rd owner and then sold to me, so it had a high chance of claim.
In any case, all of my calculations were more or less spot on (i used lowest amount in chart) so I am happy camper today and will eat a nice steak dinner tomorrow