Here's a Parshas Pinchas pet peeve of mine: Rabbis who say Tzlafchad was the woodcutter.
Rabbi Shimon (the tanna) would like a word with you*.
My other pet peeve is rabbis who say the "father of the bnos Tzlafchad"
* Explanation: Rabbi Shimon says Tzlafchad was among those who attempted to enter Israel illicitly. He disagrees with Rabbi Akiva who says Tzlafchad was the woodcutter. Rashi cites them both, but for reasons unknown, Jewish teachers only ever mention Rabbi Akiva's opinion.