Forgive me if this has been covered before but I did a search and came up with nothing. I have recently started purchasing Frogskins and 2 of the 3 pairs I have bought have uneven legs (noticeable when sitting on a flat surface). The one has a right leg that is about a quarter inch higher and the other with the left leg a little bit lower than the right. The one is not too bad and I can live with it but the other that is a quarter inch higher I am sending back as it sits crooked on the face. Is this common with the Frogskins due to the style of the frame or did I just get unlucky with 2 of the 3 I bought?