Nice, but hint for your developers

The stickers were fine; but I ran into a problem with the proof. I had approved artwork for stickers and then I did some buttons which needed another type of art work, then I went back for more stickers and I couldn't select the first approved art work, I had to select the buttons and then when the proof came, I had to tell them no this is wrong, use the first art work. It would have been nice to select my first art work.