I know of no item that is permanently marked at 10% off. We do run lots of sales at 30% and 40% and yes, your regular coupons are not able to be used. But, we also run the additional use coupons on the app that can be used on sale items. The thing that often puzzles me are the customers that have a 40% off coupon and the item they are buying is on sale at 40% off and yet, they complain that they can not use their coupon ?????????and this happens weekly! Use your coupon to buy something you either normally don't buy but would like to try or a staple such as thread, glue, ribbon, etc.