Family Dollar

I am frustrated because the manager kept asking me to add to my order although it was already 26.93. She kept adding stuff! I explained I need to spend 25 to get 5 dollars off so my order should be 21.93. She just kept saying it's not working unless I add more I don't know why and I font k ow what to tell you! It is frustrating to me. I had to add more items to my order to get 5 dollars off! This makes no sense I spent 25 plus tax and had to add more to get 5 dollars off!