Landlord is not following protocol in Texas

[Aaron W.]

I am just making sure as a tenant my rights are what I believe them to be.  I believe my tenancy is currently a tenancy at will.  My lease is up my landlord stated you can stay in the unit but if you are not signing a new lease your rent is gong to be $100 extra a month on a month to month.  My understanding is he is not following proper protocol.

I want to understand my rights and currently since the tenancy is at-will it should be based off the TAA contract I previously signed.  Now he can get me out of here by issuing a notice of non-renewal which has not been done yet or the notice of non-renewal issued will force me to act to negotiate a new lease agreement to be signed. 

I paid this months rent in the portal based off the original signed TAA.  The rent money is still sitting there as if the rent is not paid in full because the portal got changed to $100 extra a month just because he is saying it is.  I have not agreed or signed anything stating I agree to pay him an extra $100 a month.

Just hoping someone can respond and fact check a few things for me.