Security record - difference

In Star Wars episode 3 Revenge of the Sith : like 1:37:00 movie time there is Obi-wan ging to watch security recording from Palpatine arrest. Did any1 notice there is a difference on between what really happened and what is on record ?
From sec. camera it is that Anakin killed the Jedi Masters which came to arrest Palpatine, but in the movie earlier Anakin was not in there that time, he was fighting only with master Windu....
What does it mean? I am quite sure there is no mistake in the movie and this was done for a reason ...

He's not killing the same Jedi as Palpatine did. One is a Nautolan like Kit Fisto but there's a whole race of them, the fact they look similar doesn't make them the same person.

Corwinani wrote: I am quite sure there is no mistake in the movie...

Do you want me to make you a list of mistakes in that movie?
Since there is neither a release nor a reconstruction of the original theatrical version, I'll leave the choice to you whether I use the 2005 DVD cut, the 2005 VHS (provided I can find a copy of that one, since they are rather rare these days) or the 2011 Blu-Ray one.