Take a look at their Q policy here:
Welcome to Pathmark : About Us : Privacy Policy It does say something about limiting like IP's to two per transaction and only 4 like man Q's per transaction so you said you were using 9 Q's total but were you maybe trying to use more than the amount of like Q's allowed per their policy? That's the only thing I can think of since 9 is not a large number of Q's.