peter I don't follow. What do you mean with loop point at one end and other end?
Say i create a first loop in the middle of a song i accurately place one end i zoom out and then zoom in on the other end and find a perfect spot on occasions i have noticed my first accurate placement has shifted slightly and i have to retouch it, it might occur under certain condition i have not figured it out yet so it is irregular.
Just now i still come across this issue which i have reported before, if i select a loop and play it then select another loop wait for a while than change my mind and select another loop the new selected loop thats flashing to be next is not played the first selection is played then the now selected loop plays , this has been a problem for a while so perhaps you are across it, i am just reporting things as i come across them.