the package says that it will store up to 79 pitures. When I got it all set up after taking it out of the package, I was only able to take 25 pictures then the camera said that the memory card was full and would not let me take any more pictures. the package has specifications that say that the camera will store 55 pictures-high, 220 pictures-low, I am very confused. The manual realy is not very helpful. What am I not doing right?