No, that doesn't sound right to me. Specially if it is very noticable. I'm not an expert though. I've only put on some 10 skins or so.
I'm a bit surprised about that, though. I've only ordered a skin once from Clifford Essex and that was a fine quality skin. I even got an extra spare one to practise on (now, that is costomer service!)
I would call them and ask how to proceed. Maybe it really isn't a problem?