Board Thread:Questions and Answers/@comment-241978-20140419040352

In War of the Worlds: Part 1, Azmuth explains that the Omnitrix is designed to be a repository of DNA for over a million species, which is why Ben must hide from the battle and keep it safe. Then 14 episodes later in Primus, Azmuth contradicts himself and states that the Omnitrix is nothing more than a receiver for the Codon Stream which actually contains the DNA, thus making his statement to Ben one giant lie that serves no purpose other than keep him from helping the fight. The third Omnitrix, however, removes the need for Primus and the Codon Stream by storing the DNA inside itself, just as the prototype was explained to do originally, then Primus and the Codon Stream were later retconned out again by the Anihilaarg, to get the plot right where it started.

Why exactly did the writers decide to contradict themselves and add/remove Primus and the Codon Stream? This is incredibly sloppy writing. Just because it's a children's show doesn't mean the writers get to ignore things like basic logic. 