Well, most likely what is happening here is that you are seeing the results of different sort criteria. Your camera sorts them in one order (most likely date and time) then shutterfly sorts them by another criteria (filename, or upload date or something). You can, I think, change the way Shutterfly orders the photos, or you could rename the files. What you have to remember is that at the point they come off your camera, they are just image files, with no particular 'order' to them, so you have to tell the computer, or the file host in this case, how to sort them.