I have the sport seats and I found mine doing the same thing at 3000 mi..... I also found that the velcro on my cargo shorts was the culprit. Do you have velcro pockets?
2012 Focus SE hatchback sport, 203a, MTX-75, Candy Blue, Custom 2.5 Exhaust, K&N Typhoon.
Sonic Crew #012 E-123 Omega