Continuity mistake: When Anakin and Padmé are walking towards her ship while discussing the situation, as happens with surprising frequency, Rex, walking behind them, is missing his kama (the kilt). (00:04:35)
Continuity mistake: When Ahsoka suggests that Chairman Papanoida's daughters might be being held on the Trade Federation ship blockading Pantora, she refers to it as a planet. "Trespass" established that Pantora is a moon. (00:06:47)
Continuity mistake: When Baron Papanoida walks into Jabba's court, his half-cape is missing. (00:10:24)
Answer: I guess that 1) the King assumed that Ventress' droids were meant to capture the Jedi, not kill him outright. When she yells at OOM-224 to shoot Yoda, she evidently failed that expectation. 2) Sending out a bunch of Droidekas after it is plain that Master Yoda has clearly won is not a sign of good sportsmanship, either.