I took 400 shots at an event and imported them all into a single project, and did not delete the images from the camera.  I edited down the 50 best shots, and gave them to the event organizer who now is requesting a few shots that are still on the camera but have been deleted from Aperture.  I reattached the camera to selectively re-import those shots but Aperture will now not display all of the images on the card - only the same group (plus a few others) that are my finals in my Aperture project appear available for import although all 400 originals are definitely still on the memory card in the camera.  I don’t understand what is going on.  Advice?  Insight?