Hi Rik,
If you have both SmartStudy Mode and Repeat on, it should show lower
numbered boxes less frequently than higher numbered boxes. It doesn't
run through a single box at a time or anything like that, but it
weights the probability of each card showing up based on the box it's
in. That means a single card in box 1 is more likely to show up than
say a single card in box 4. However, this is based per card, so if
you have 50 cards in box 4 and 3 cards in box 1, you're still more
likely to see one of the 50 in box 4 than one of the ones in box 1.
Thanks,
Jason