I have a contract to purchase a house. My home inspector says the toilet in the first floor half bath is loose/wobbles and the wood floor it sits on is cupping. The seller disclosed an earlier leak that was repaired. They didn't say where the leak originated, but I assume from the tank. House is 15 years old and built on a slab. I keep getting pushback on repairing it. They want to give me a credit, but I don't know what the real problem is, so I want it fixed. I don't believe that they can identify the problem without pulling the toilet, as it could be the flange, seal or the cupped floor. I would appreciate some feedback from you professionals as to how you would go about identifying the problem and fixing it.