Oh yeah, did you get a survey?
I damned sure wouldn't trust anything he told you about the land, including acreage, encroachments, etc.
He may also have gotten a better offer from someone else and wants to drop the deal with OP. I've had this happen to me many times.
This is why I ALWAYS file a lien against the property when I get a contract.
Bilateral agreement signed by both parties, notarized and filed at courthouse.
That way, seller can't get around me. It blocks clear title.
He may talk me into letting him off the hook, but I don't do that for free. $$$$$.