After his outfit changes, Rebos' shirt with suspenders turns back to a tuxedo before he transforms the car into the catering truck.
When Batman reveals that "Superman" is an android double he disappears (his chair is empty). Robin points out that they could have solved the case, and the scene flashes back to the table briefly. Unfortunately, the scene change isn't quite brief enough for the reused cel--Superman is there sitting at the table.
Batman and Superman should have recognized Doctor Rebos since he already revealed himself on screen to the Super Friends.
In various scenes, the name of the base changes back and forth between "Camp Corageous" and "Camp Courageous" (correct spelling).