I just sent my Expert off for the same thing, It shows no pics saved on the card, but will show events for every time it took a pic. When it takes a pic, it shows Err. card full and nothing is on the card. I called Non Typical and they told me to send it in for repairs.. Hopefully I get it back quickly.
My Stealth showed the same thing when I first went and put a card in it. I had to format the card and that cleared it up.. I am not sure about what your problem may be, however if it is a new card you may need to format it prior to using.