Card Change?, o_O Options

[Guest_Zio_*]

I thought this was kinda wierd and I still have no idea how I did it. After I beat Pollux the other night (that bastid took me forever -_-) I got my cards and was just hitting L and R and stuff while my cards were being showed to me from the pack a Delsaber's Buster card changed into a Cadeceus (however its spelled). I actually had this happen a couple times with a Savage Wolf and an Al Rappy card but they didn't successfully change. I was wondering what is up with this?