cheese string stacking at SOF?

Will they accept all those tear pad coupons out there for stacking cheese strings or consider them the same source?

I haven't tried the cheesestrings ones .... but the last two shops I've done at SOF I've had them question all stacking coups..... it seemed to be more the coupon wording "not to be used with any other offer" ... "one coupon per item" and another one can't remember what exactly. Before it just seemed that the "not valid with any other coupon" was the one that wasn't accepted. I was buying 2 of the van houtte bags - they wouldn't take more than one coupon.... They didn't seem to question the "source" of the coupon - ie - tearpad - insert - mail - etc .... :)

thanks.