Why is my TV volume going all the way up or on the way down and will not let me control it and stay at the set level that I wanted to
Your trouble report is not really clear. How are you changing the volume? Also would need debug enabled logs of you trying to change the volume.
To get a better understanding of the problem you are experiencing we need more information from you. Please see http://osmc.tv/wiki/general/how-to-submit-a-useful-support-request/ for advice on how to help us.