Continuity mistake: When Ahsoka leads a captive Cato to Jocasta and asks if she's all right, before they head off to call security, Ahsoka's lightsaber is absent from her belt in the first shot, but present in the second. (00:20:31)
Plot hole: Cato doesn't even know who Ord (the person she is impersonating) is, and yet she manages to perfectly imitate his voice and manner. She wouldn't have transformed her own internal organs, since she probably would have ruptured them.
Suggested correction: Quite apart from anything else, Cato is a member of a shapeshifting species, so why wouldn't she be able to perfectly take the form of another species? And her internal organs have nothing to do with the plot of this episode.
Character mistake: After Anakin says to use the walkers (AT-TEs) as boarding vessels, Rex calls the first one an AT-AT (a vehicle that does not even exist at this point in-universe) while ordering a battalion of clones into it. (00:04:10)
Continuity mistake: Ahsoka is wearing a red bodysuit for most of the episode, but when she falls to the floor after Bane shocks her unconscious, her legs are miscoloured a pale pink. (00:13:21)
Continuity mistake: When Obi-Wan and Mace retrieve the stolen holocron at Black Stall Station, the device is shown as completely closed and back in a cube configuration. This is despite the fact that the previous episodes of the arc established that Jedi holocrons can only be opened by Jedi, and it was last seen partially opened after Bane inserted the data crystal, with no contact with any Jedi between Bane's escape and the arrival at his hideout. (00:15:08)
Continuity mistake: The opening scene after the narration shows the end of "Cargo of Doom" again, focusing on the clone troopers, but the details are different, including Anakin and Ahsoka disembarking the shuttle with R2 and some of the clones removing their helmets before leaving, when that didn't happen in the previous episode.
Senate Spy - S2-E4
Continuity mistake: When Padmé accesses the holo-table with the droid factory plans, she puts her clutch purse on the edge of the table. After she guesses the correct password, the purse is absent from a shot facing her as the hologram activates, but present in the next shot. (00:15:56)
Continuity mistake: During the opening briefing with Palpatine, Mace Windu and Yoda, Luminara Unduli attends via hologram. But during the shots where Obi-Wan is explaining the attack plan, and the shot over the shoulder of Palpatine's hologram looking at Obi-Wan and Ki-Adi-Mundi, Luminara is shown as being physically present (i.e. not a blue, translucent hologram). After Palpatine, Mace and Yoda sign off, she's back to being a hologram. (00:02:00 - 00:02:30)
Other mistake: Commander Jet does not hold the rank of "Captain", but he's addressed as such, just as many times as he's called by his proper rank.
Continuity mistake: When Rex is giving orders to the heavy cannons after the super-tanks emerge, his kama is missing.
Continuity mistake: After the first encounter with the zombie Geonosians, it's shown there are four clone troopers in the group when they retreat. When Obi-Wan orders two of the clones to try and head back to the surface to get reinforcements, there are suddenly several more clones present. (00:11:32)
Continuity mistake: When Obi-Wan duels Grievous on the bridge of his Arquitens cruiser, the cyborg General slashes up several computer consoles with some of his four lightsabers. Later, when Obi-Wan sends two clone officers to the bridge to try to detach the ship, the consoles are in the background with no visible damage.
Continuity mistake: After the newsreel, the episode's opening scene is of Grievous seeing Republic ships flying in to land and declaring that he needs to find an escape pod. But only in his second scene in the episode is Grievous informed that the transmitter on his escape pod is broken, prompting him to make that decision. (00:01:25)
Plot hole: When Lawquane spots the droids in the field, he identifies them instantly as commando droids. But as he had left the Republic Army shortly after the first battle on Geonosis (the one which started the war) and has lived as a farmer ever since, and since the commando droids are relatively new (see "Rookies"), how can he know what they are? With his lack of battlefield experience, he should simply call them battle droids.
Revealing mistake: When Ahsoka and Master Sinube are on their way to Ione Marcy's apartment, Ahsoka's sash keeps clipping through the bottom of her skirt. (00:09:25)
Other mistake: Obi-Wan Kenobi discovers the Mandalorians and gets into a fist fight with them, punching one in the face a few times, who reacts with obvious discomfort. But the one hit is wearing Mandalorian armour, famously resistant to all kinds of weaponry, and Obi-Wan is barehanded! The Mandalorian should be laughing off his attempts. Not to mention that later he surprises another armed guard in Mandalorian armour and knocks him out with two barehanded blows to the helmet.
Suggested correction: It must be pointed out that unlike the Mandos he's fighting, Obi-Wan explicitly has supernatural powers, powers that most certainly help with things like punching out people in full armour. Seeing this as a "mistake" is kind of ridiculous in a space fantasy series.
Continuity mistake: When Mixer and Redeye are first seen patrolling the Coronet's hold, their armour markings are visible in the first shot, but in the second, their armour is suddenly plain. (00:01:42)
Continuity mistake: When Anakin is facing down one of the assassin droids, after it throws Redeye's body at him, he and the droid are suddenly in a different part of the cargo hold, with fewer crates around them. (00:09:04)
Deliberate mistake: Pre Vizsla's appearance in the hologram doesn't match up with his appearance in the previous and succeeding episodes, as he's wearing clone armour covered with a cloak that has a different symbol on it. This is because when this episode was being produced, Vizsla's final character model wasn't complete yet. (00:16:25)
Continuity mistake: Satine and her guards along everyone else who entered the shuttle at the end of the episode disappear - you can easily see inside the shuttle and through the other window.