Audio problem: In the Swedish release, the language suddenly switches to Danish, then back to Swedish again. This is according to the DVD copy I have of Season 4 Volume 1. (00:08:41)
Continuity mistake: When Fives is telling Rex he, Jesse and Hardcase are going through with their plan, Jesse and Hardcase switch places. (00:12:26)
Continuity mistake: At the beginning of the queen's audience with Count Dooku, when he says, "But I was invited - by your faithful advisor. He's concerned over how attached you've become to Skywalker," there is a shot of Dooku walking up the room, then it cuts away to the queen and Atai Molec (the advisor in question), and when it cuts back to Dooku, he walks through the same part of the throne room as in the previous shot of him. Take note of a screen on the side of the room - it's in the same position both shots. (00:05:35)
Continuity mistake: When Anakin is cutting through the door of the Kadavo facility after Master Plo's forces have arrived, the position of the hole he's making is different from when it was previously shown. When he finishes cutting the hole and kicks in the cut-out section of door, the hole is back in its original position. (00:14:25)
Continuity mistake: Pong Krell's goatee is missing during the conversation he has with Rex during the march, most noticeably when he says "CT-7567, are you reading me?" (00:13:25)
Continuity mistake: When Count Dooku is speaking to Riff Tamson via hologram, the clasp of Dooku's cloak is missing in one shot. (00:00:57)
The General - S4-E8
Continuity mistake: Pong Krell's goatee is missing at the end, when he accepts Rex's report that the base has been successfully captured. (00:21:02)
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.