Actions which were never expanded upon in-game, need I remind you.
What makes me not think this really relates to "omfg Namine is Kairi's Nobody" is the constant comparison between Namine and Xion when Axel is concerned in the game. Axel keeps saying Xion looks like Namine in the reports once he gets to see her face, and Saix even throws in half a word about both girls being Axel's 'favorite people'.
Arguably, it could tie in with Kairi and what not, but Xion broke away enough from that to make me go "meh :\".
Everyone had their perceptions of Xion, but the game came up and tossed them to the hollow winds. Hell, Axel even making an issue out of how the girls look alike with Xion's looks being nothing more than a big, fat, red herring makes me wonder all the more about the content of that report.
Also, KoV. Something that came to mind about the possibility of discussing their make ups. Aside from me thinking Namine having Sora's B+S makes all but no sense, it kind of makes the point in the novels where Axel does compare Namine to Roxas as far as Nobodies are concerned redundant. Now that might be part of the novels that would be retconned out of canonity later, but I think that if he knew she was made up of Sora's B+S he'd have gone about things in a different way, both with Kairi as well as Sora.