It sounds like the landlord is practically bipolar and constantly changing her mind. There is the legal approach of hiring a landlord/tenant attorney to represent you to fight an eviction or probably the wiser decision is to simply get out of this incredible mess. With her being ill and the constant fights upstairs, do you really want to remain in such an environment?
The information provided in this answer does not create an attorney-client relationship and is not considered to be legal advice. Mr. Leroi answers questions on Avvo because he strongly believes in public service from his years as a judge, magistrate, and prosecutor. If you need to ask any follow up questions because my answer did not fully address your question, feel free to call Chris or post an additional question. Thank you.
Why would you even fiddle with this? Get out of there!
In no way am I offering you legal advice, and in no way has my comment created an attorney-client relationship. You are not to rely upon my note above in any way, but insted need to sit down with counsel and share all relevant facts before receiving fully-informed legal advice. If you want to be completely sure of your rights, you must sit down with an experienced criminal defense attorney to be fully aware of your rights.