I too an having similar issues. Between the thickness of the material (which otherwise I would feel is good) and the fact it was packaged and shipped folded I'm surprised there aren't other people with the same problem. Perhaps its because I live in a cold part of the US and its an issue caused mostly from just having the thick plastic being subjected to shipping stress while the plastic was less flexible in the cold and that caused the initial cracking? So I just got unlucky?
