I smell stupid on this. When you go through housing you see and sign a MAP that shows the real estate you are buying and the title search company is bonded and insured to cover any possible mistake they made.
You’d think you’d notice the title having a “unit 5” specified on the address, and notice you were walking into the unit with a “4” on the door. At least I would.
I’m figuring that both of the houses had doors, and both of the doors had locks, and that the keys to one house did not fit the locks on the other.
In other words, if it was an honest misunderstanding on his part, he would have noticed when the keys didn’t work.