SD card seems to be DELETING my camera photos.

[Lumos]

I got a 32g class 6 (if that matters) SD card from BestBuy today and it has been nothing but problematic all day. I finally got my music on there (only some of which the music player will actually, you know, PLAY), and now the camera is saving to the card, only when I go back there's only my most recent one, and then that eventually disappears too. It is deleting the photos I take that are supposedly being saved onto the card.

Someone help, PLEASE? This is really starting to frustrate me.