The Peruvian Puff Pepper - S3-E2
Other mistake: Drake and Josh find the monitor in Megan's room. After they reveal the normal wall and the family leaves, Megan hits the button behind the picture to show the monitors. However, when Drake and Josh find out that Megan entered the salsa competition, they storm into her room, but the button is still revealed in the background.
The Peruvian Puff Pepper - S3-E2
Continuity mistake: If you look at the kitchen table after the salsa exploded; you can see no salsa on the kitchen table.
The Peruvian Puff Pepper - S3-E2
Character mistake: Drake says he hasn't been in Megan's room since he was five, but he brings Grammy's bags up there in the episode "Grammy".
The Peruvian Puff Pepper - S3-E2
Revealing mistake: In the scene where Megan puts the stuff in the salsa and stirs it with the spoon, she takes it out and it is clean, then Josh stirs it again and the spoon comes out clean again.
Chosen answer: Well, she is the most liked sibling, so she can probably get more out of her parents, or get money from both of them without the other knowing, or as we saw in the Gary Grills episode she can get money from people easily by telling them all sorts of stuff.