Continuity mistake: When Eric purchases Rachel's tank top, the placement of his right hand while holding it changes when he says "I'm a collector." (00:10:43)
Continuity mistake: When Topanga puts the bucket in the garbage bag, she is holding the bag with her left arm and has her right arm in it. In the next shot, she is holding the bag with her right arm. (00:00:36)
Answer: Topanga's middle name is never specified. Considering her sister's name is Nebula Stop-the-war Lawrence, Topanga's is probably something equally unusual.