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Moving an item - choosing a position
It can be confusing to choose a position when moving an item. We move the relative items above/below the new items position as needed.
Take the below example. In a folder "Folder 1" we have three items, A, B and C. Their initial positions are 0, 1 and 2 respectively. If I wanted to move the middle item, B to the start of the list I would move item B to position 0. The remaining items, A and C would now fall into position 1 and 2 respectively.
Note that if I wanted to move B to the end of the list instead of the start, I would have to move it to position 3 (the phantom position which is at the end of the list, after C). Once B is moved to the end, we recalculate the other surrounding items so the final result is items A, B and C at positions 0, 1 and 2.
If we moved the middle item B to position 1 or 2, then none of the items would move at all!