I go to this location quite often and I've never had an issue until today. It was very busy and I understand it took longer than usual. i had asked to have my milkshake after my meal and reminded the waitress of this when I was finished. The waitress was very nice and I know she was busy. I waited about 15 minutes and finally she brought me my milkshake but it was in a to go cup. I did not ask for it to go. When I opened it I noticed the cup was half full of milkshake and the rest was whipped cream. I went to the register and asked about this. I was told it was made correctly. Um ok. So I just wanted to leave. The manager rang up my order with the coupon and it was $6.41. Then she walked away. I wanted to pay with the app, the machine hooked to that register did not work so a different girl rang me up. She asked which receipt was mine and I told her I had a coupon for $4.99 for the meal and shake and I got an ice tea and it should be $6.41 as it still showed on the other register. She looked confused, rang me up but the total did not show on the register. I scanned the app and left. When I got home I got an email saying my meal was $8.19. So the girl knew she did not know what she was doing and just overcharged me. I know it's not a lot of $, but it is unacceptable to know you are doing something wrong and do it anyway. Be wary using the app to pay and next time I will ask for a paper receipt.