When Danny first calls one of the hamsters "Dean Martin," the hamster is shown up close and is clearly a different looking hamster (albino) than when seen farther away (light brown or tan.)
When Chris and Tracy first sit down for dinner, there are no plates in front of them on the dinner table. But a few seconds later, when the camera cuts back to them, they both have plates of meat. In the next shot, Chris' plate is gone and only Tracy has a plate; then in the next shot, plates are back in front of both children again.
When the kids are giving away hamsters with autographed albums, a man with light skin around his eyes from wearing sunglasses is seen getting an album and hamster from Laurie. The scene cuts to Keith giving a hamster to a girl, and as the camera follows her leaving, the man is seen again in line behind Laurie. Later, he's seen getting an album and hamster from Tracy.
The Partridges were selling 3 different albums. He bought two different albums and thus received two separate hamsters after getting back in line.
The Partridges were selling 3 different albums. He bought two different albums and thus received two separate hamsters after getting back in line.