The scene where Freddie, Sam, and Carly baked close to forty pies and Spencer is talking to them while they are full of pies. The shot of Carly has a piece of pie on her lap. The fork changes position a couple of times then the piece of pie disappears without Carly moving an inch.
It never expressed the fact that there were other types of pies to eat. Just the coconut cream pie was expressed.
Mr. Galini's computer has no disc drive slots and no cables plugged in to it - it doesn't even have any sockets or terminals where cables could be plugged in.
When Sam and Freddie knock Mr. Galeni's computer onto the floor, two of the hidden pie recipes go flying off, leaving one in the computer. When Carly discovers the hidden recipes, she pulls all three from the computer.