Got a new one from Duda and it looks nice (23-30plate) but when you place it on a flat table it wobbles b&f and from corner to corner. The sales guy said they are all like this due to having even number of plates. didn't make sense to me since all of the plates are the same height, they just appear to be out of square, as if you placed hands on the ends and twisted in opposite directions slightly. just want to know if this is typical or if I should insist on sending it back for replacement. thanks