I won an eviction case and wrote out my rent check. After doing so i realized that i forgot to prorate on the first month l lived there so i wrote a letter to my landlord showing where i prorated and wrote a new check i wrote in the memo paid in full through oct 2022 and also ask my landlord to give me back the other check that wad the wrong amount and not prorated. She cashed tbe prorated check but refuses to give me back the other check and keeps trying to cash it (ive been kerping my account low enough where it wont go through) now she is taking me to court saying i owe alot more than just the rest of amount from the prorated check. Is the check sje cashed legal binding in missouri?