I think you are thinking about the scene with: "Either chose brings grave danger, to us all", right?
I have a question that I have since the day I saw TPM:
I can't remember the sentence exactly but it was said by Sidi, and was about he didn't understand the move of Amidala when the scene before she explained it to Palpa, so this is maybe the hint that these 2: Palpa and Sidi are clones, this rumor is in circulation since 1990 if I'm not mistaken
sand person 10: there is a difference with Padme and Sabe (I think that is the name)
Sabe is a handmaiden that is a very good friend of Padme, they switch a few times in the movie, so if there is an assassin they kill the wrong person, I thought this was very easy to notice because they have different faces: Sabe is not that 'fat' in the face, but Padme is. It didn't fooled me when I first saw TPM
Darth: I don't say they are clones, what I'm saying is that I find it strange that Sidi doesn't understand Amidalas move because it is too agressive; but he heard it a few seconds before from her own mouth. It was just a question that I had and I hoped that there was a simple answer to it
Yerssot is right. The decoy Queen is Sabe, not Padme, played by a different actress.
The point of the handmaidens is that they all look vageuly similar to Padme, so in an emergency, a bit of make-up and the right headdress and they can easily be mistaken for her.
Watch the movie again closely; you will easily spot the differences between the two.
And yes, Padme is just playing it catuous and safe by continuign the decoy even on the ship. The trick was that no-one else was to know either, even the Jedi.
Natalie Portman plays Padme Amidala Naberrie.
Keira Knightley played Sabe who as was said in the film was here "decoy, humble servant and loyal bodyguard". When Naboo was invaded by the droids, Sabe (Keira Knightley) dressed up as the Queen and Padme Amidala(Natalie Portman)dressed up as a handmaiden so she would be safe.
Watch the scene on Tatooine when Panaka tells Qui-Gon that Padme wants to go with him to Mos Espa. He gives Padme a very concerned look because Panaka knows that she isn't a handmaiden but the Queen in disguise.