Sister, Sister - How Could This Be?
In the episode "Ladies In Waiting" Tamera says to Tia, "Do you remember the 8th grade spelling bee, the one where I studied for two months so I could beat you..." Here's where she slipped up, Tia and Tamera met when they were in the nineth grade. They mention in the pilot episode "The Meeting", that Tia lived in downtown Detriot prior to meeting Tamera, so they weren't even in the same school. How could they have been in the eighth grade spelling bee together, they didn't even know each other then.
Season 5 Episode 16 "Ladies In Waiting" & Season 1 Episode 1 "The Meeting"