That is exactly the OP needs to put into consideration. And yes, why all of the sudden that the name change comes into play? Obviously, the Bio Dad's name isn't on the kid's birth certificate, and the move seems try to establish some sort of connections between the kid and the bio Dad. The reason that the OP given is kind of not making sense at all, by changing name to make the kid looks like not born out of the wed lock, what? Man, maybe I am wrong, but it really looks fishy.I must be misunderstanding something but why is the name change thing a big deal? Future sponsorship of who? The child's dad?
But agree that the short courtship is a big red flag. Getting married during first face-to-face visit is one of the bigger red flags there is.