When Ed is reading the contract Dexter gave him, the top right corner of the paper is clean. A little while later, the top right corner is messy from the sauce. When he hands it back to Dexter, it is clean again.
After Ed and Dexter fall into the laundry basket, Dexter says he needed to distract the kitchen staff so Ed could come in and steal a bottle of Triampathol. They didn't need to enter the kitchen when they could easily have just grabbed one of the boxes of the food additive that were sitting on the shelves behind them.
When the crew is cleaning up, Otis says that it was closing time. Kurt comes in to tell the crew that that night was the big opening night for Mondo Burger. After Good Burger's electricity goes out due to Mondo Burger, the crew is sitting around in the dark. Dexter comments that since there were no customers, they should leave. The store was already supposed to be closed, so they wouldn't have been there anyway.