Without seeing them it's hard to say. Do you use the elastic band on the CRC to hold them in, or tape? Do they fit snugly or are they a bit of a squeeze to get in? How much do you crash?
They shouldn't crack, and to have all four packs crack is not usual. Take photos, send them back to your supplier and see what happens. Failing that, ask Wim at AMC if he thinks sending details to CRC direct would help. Both AMC and CRC are very good with this sort of thing if they deal with nice people who are reasonable.
I suggest you get off here and onto your original supplier, AMC and CRC and see who can help you. It doesn't seem right to me, but I am not the supplier!! HTH
