Checkers sixty sixty

We have 2 Chekers veru close to is. When we by via the sixtu sixty app it always tales our order at the small checkers and the last 5 times less than 80% of products available. We have asked to change our link to the bigger checkers but their app is not able to do so. This is very disappointing as we still need to then drive to the checkers. If the app cannoy let you choose the shop you prefer what is the use....