Continuity mistake: When you look at the house from the outside the upstairs is on the left. But, when you go inside facing the same direction, the upstairs is on the right.
Deliberate mistake: In the Search for the Stars contest, at the end of the song their mouths have stopped singing as they go to bow but you continue to keep hearing them apparently sing a few seconds longer as it fades out. This is a joke referring to the original Brady Bunch episode where the kids sing the song on live television and the song similarly fades out after they've stopped singing.jerimiah
Revealing mistake: During the scene where Mr. Dittmeyer is standing in front of the 9 TVs, you can see that the middle 3 people (Mike, Carol and Alice) are all taken from the same camera/angle as they all have the same background. As such that would then mean they were recordings being played back vs. being live shots as beginning of the musical number portrays.jerimiah