Stupidity: Recurring issue when Ahsoka is fighting with dual sabers - there are often times in a duel when one saber is clashing with the other person, but she still has a hand free with her shoto that she could use to stab/slash and win the fight easily. Would make for shorter battles of course.
Two Hundred Dollars and a Bus Pass - S1-E8
Stupidity: Two police officers and a physician find an injured woman in a lab. The officers attend to the woman while the physician calls for EMTs. Wouldn't it be better if the physician looked after the injured person while the officers called for help?