AR Games Weirdness

So I've had my 3DS since launch, and while I haven't had the time to do any formal reviews, I have been using the device daily. Once thing I haven't used much though, are the AR Games. I played them when I got the system, and then just put them away until now... and I encountered something... weird.

I took out my Mario and ? cards, placed them on my desk. I then took out my Pikmin card and held it to observe how it tracked the card at different angles. As I moved my Pikmin card in front of the other two... and strange thing happened. Kirby showed up and quickly disappeared! After a ton of tries, I realized it was happening when I covered the ? card a certain way, leaving just the bottom exposed. I managed to get 2 snaps of the occurrence:

I also tested what happens when 2 of the same card are visible. Sadly, no you cannot make a Pikmin army, as the software will only recognize one of each card, so it will either only identify the nearest image or the characters will pop between the two...

Now I'm just curious if Nintendo has any plans to release new cards, or update the software to allow for multiples. Because I'd be all over that. I did buy an e-Reader after all ;)