Continuity mistake: In the last scene Gareth Gates was a clone but he had a belly button and the clones didn't have them.
Audio problem: When they are all going to bed, Alastair puts headphones on Tina's clone and she says, "Thank you" but her lips don't move.
Audio problem: When Tina is showing the clones how to use a boomerang she is speaking but her mouth doesn't move in time and at times her mouth doesn't move at all.
Factual error: In the two "live" concerts, the one at the beginning and one at the end, both show the seven original members, not the six shown in the movie.
Continuity mistake: When clone-Rachel brings biscuits for Bradley, Tina has a book covering her face. In the wide shot, the book is upside down, but in the close up of Tina which follows, the book is the correct way up. (00:47:30)
Plot hole: The 3 minutes to destruction scene actually lasts for about 3 minutes and 30 seconds - they're lucky to be alive.
Continuity mistake: In the cafe scene, the waitress cuts Rachel's credit card in half, dropping one piece onto the table and throwing the other piece away. In the next shot, Hannah picks up both pieces from the table in front of her, offering to glue it back together. (00:13:10)
Continuity mistake: During 'Don't stop moving' as S Club mount the stairs towards the end of the song, Jo is nowhere to be seen. Once they are at the top of the stairs she reappears again briefly, as they say "Bye.", but then in the next shot of the group running up the rest of the stairs she has disappeared again. In the very next scene, the five members of S Club leave the prison without Jo. In the shot where Jo walks out of the prison alone, the blue graffiti on the wall has been removed. (00:23:20)
Continuity mistake: When the villain walks up to the console, he places his right hand on the lever and his left hand on the machine. In the next shot he is standing away from the machine and does not have his hand resting on it. (00:01:40)
Other mistake: During S Club's short press conference in Barcelona, the name labels on the table are not in the right positions. (00:04:30)
Plot hole: If all the clones are required to shower together, and refusing to do so is a 'breach of protocol', Jo's clone should be present in the showers, but she is not. (00:50:05)