Other mistake: The Partridge family is suppose to be famous, but they never seem to play to more than a small handful of people in some lounge.
Real or Robots/Special Delivery - S1-E9
Other mistake: Before Tommy and Chuckie climb up back on Stu's bed position, Stu's hair is orange, just like Chuckie's.
In Too Deep - S1-E23
Other mistake: When Miriam tells Zane she will give him the necklace for a kiss, she said "I will give it to you." But then when she throws the necklace in the water, she said "I didn't say I would give it to you."