@Pablo Garrido Suárez, given how long you've been here, do you think it's really necessary that I have to remind you again to upload batches of images within a pack instead of individually? It's much easier for cutters to pick them all up that way, and much easier for you to upload, so it's win-win, really.

Sorry, I know, but I can't find a way to do it. 

Just ask then, man!

It's this easy, and there's a video tutorial showing how it needs to be done: