Death Trap - S2-E20
Continuity mistake: When the alarm goes off, Sergeant Crasher tells his cadets that there's been an explosion and that they'll show the crew how the Clone Youth Brigade does things. As he's saying this, the camera cuts from him to a closeup of Hotshot before back to Crasher, who is walking through the same group of cadets in the exact same way in both shots. (00:10:36)
Death Trap - S2-E20
Continuity mistake: When Commander Ponds orders some other clone troopers to evacuate because he's staying onboard with the Admiral, his kama (kilt) is missing, and his blaster pistols are missing from his holsters. (00:16:46)
Answer: Dooku never accepted Ventress as his apprentice, as far as I know; he just kept her as his devoted personal assassin. In Phantom Menace, it is stated that there can be only two Sith at a time, to prevent a power struggle in the lower ranks. To accept Ventress as an apprentice, Dooku would have violated that rule.