I'd like to see a picture also. Curious to see if it's the same issue I've dealt with. When one seam butts together and the other end doesn't I flip it so it butts, then take scissors and clip the middle so both ends lay flat. Is this what you're talking about? If you've seen Eleanor Burns do her method of making flying geese she clips in the center so one side lays one way and the other side lays the other way. That way both ends butt together nicely.