GOOFS AND MISTAKES
On an early episode of "Sister Sister" ray is dating a woman who appears in a later episode as Lisa's sister.
On the episode where Tia goes out with a college guy she says that she is the oldest but on the episode when they go to a cabin Tamera says she is the oldest.
Tia and Tamera's real life brother appeared on several episodes but was never the same character.
When Roger is telling the twins' boyfriends about their most emmbarrassing moments he says that when Tia tried to give herself a perm and he pulled off her hat she ran into the boys bathroom with emmbarrassment and all the boys ran out but that never actually happened.
The cat that Lisa found (named Little Ray) is no longer seen or mentioned during later episodes.
On one episode actress Gabrielle Union plays a shoplifter named Vanessa and in a later episode her name is Shawn.
On one episode Tamera is dating a guy and he breaks up with her so she enters a talent contest to win him back and on the episode with Mary Kate & Ashley Olsen she is dating him again.
On an early episode Tia is dating the Pizza boy and in a later episode Tamera dates him when she's voted as class beauty.
On an early episode Tia double dates with Tamera and goes out with a guy best known for his quote "chicken butt" and in later episodes the twins act like they hate him and would never date him.
On an early episode the twins enemy Rhonda is freinds with a then unknown Diavian who later becomes their best friend.
On one episode rapper/actor Kid from the group Kid N Play stars as a famous rapper named Chilly T but on later episodes he is Tia's boss named Clark