My wife and I did not intial or date next this section since it stated that we would return the house to it's original condition if we hung pictures. The lease we signed did not have this section. I have a copy. The owners mailed another copy with addtional changes made. I told them this is not the lease we signed. When I pointed this out, they hired an attorney. They sent me a 10 day notice to comply demanding I pay a water bill that occurred before I moved in. On the notice they changed the dates. I have a copy of the bill showing it was from prior months. Is the lease valid if they changed after we signed? How can I fight against their false claims?