I see what you're talking about here! When making my first project I felt like the right side was lower. I worked on not pressing so hard on the right and when I took it off the loom it looked totally normal. So I don't know if it was really just my imagination but in the end it was a non-issue. How did yours turn out?
Thanks so much for your help! I haven't finished yet but I think I figured out that the problem stems from warping on in a slanted direction to the back beam. I took it off and straightened it out the best I could. I will post a fined picture soon!