I used the coupon zone coupon at WM in St. Thomas today with no problem at all. However, at RCSS I tried to use the $4 Advil manufacture coupon and a $4 Advil coupon zone coupon and they wouldn't let me to do it. Said it had to be one or the other as I would be getting the Advil for free plus making money which would have gone to my other grocery items. I thought that you could use both a coupon zone and a manufacture coupon at RCSS....anyone???