When Jim returns from his meeting with Dominic Marcon on the golf course, he finds Rocky putting away groceries in his trailer. Rocky approaches him during the conversation holding a box of Grape Nuts Flakes, but during their conversation it turns into a box of Kellogg's Corn Flakes, even though Rocky never goes back to the grocery bag or the kitchen cabinets.
When David races out of the trailer after confronting Jim, Jim looks outside to see David's car drive away. But the car, which we heard pull up at the beginning of the scene is now parked way over at the restaurant. There's not enough time for David to run way over there and get in the car.
When the two thugs pick up Jim at Angel's place to haul him off to the golf course, he's wearing a dark brown sports coat. However, at the golf course he is wearing a light colored plaid sports coat. Then when he returns to the trailer and takes the jacket off, angrily throwing it down while telling Rocky about his "bad golf game", it is once again the dark brown one.
Jim pushes David out of his trailer and then gets his gun from Angel. But the man that reopens the trailer door is not the actor that plays David. Added 2/11/22. This is not a goof. David's Uncle Dominic said that he would have Sammy back David up. He (Sammy) was the one who reopened the door. While He shot into the trailer David has time to get to the vehicle.
When Rockford and Angel stop for gas on the way to the Indianhead development, Angel orders a small jalapeno pizza and it is delivered to him less than 50 seconds after ordering. Also, after visiting Indianhead, they are back at the same gas station and Angel is still eating the jalapeno pizza. (Note: As soon as Angel had been given his pizza, Jim had him take it to go. After leaving Indianhead, they returned to the gas mart so Jim can "sort things out' where Angel finishes his pizza).