My question involves landlord-tenant law in the State of: Utah
I have been renting an apartment for about 8 months. My friend who lived across the hall from me wanted to move out of his apartment and found another person to rent it for the remainder of the contract. I liked my friend's apartment more and made a deal with him that I would take over his contract if the person he found would take my contract. The new tenant and I both signed our new contracts, I for my friend's apartment and the new guy for my apartment, but the new guy has never paid the deposit or the first month's rent and is facing probable eviction. Now the landlord is saying that she never signed the contract with the new guy and that his contract would now also be my responsibility if he is evicted.
This is just ridiculous to me. It was my understanding that when we signed our new contracts, I was out of the old contract and only responsible for my new one. If I had thought that there was a chance of the old contract reverting back to me, then I never would have signed the new one. All I have ever done is been a good tenant who pays his rent on time and takes good care of the apartment. I feel that the landlord had an obligation to inform me that I wasn't out of the old contract yet before allowing me to sign the new one. She should be well aware that I can't live in two apartments. I certainly don't have the money to pay rent for two apartments. Where do I stand in this?

