Grocery store: I take an item or 2, remaining items way back & no longer visible .. do I move ..

Let's say I grab one or two of the same item from a low shelf, and there are still ones remaining, but they are far back and one would have to bend way over or get on the floor to see them. So, I think about others and move up one or two of the back items near the front of the shelf so it/they are easily visible (edit: and reachable).

(There are times when it's hard to find a certain item in a very busy shelf full of similar items, so even sometimes when all items are front and visible, it still can take a long time to find what I'm looking for. With the item I'm looking for being way back in the back of some narrow hole, on a lower shelf, well, I'm sure I've missed seeing something I had spent several minutes looking for that was there.)

But I keep wondering am I really doing others a favor? Do the grocery store shelf stockers clue off the empty spots (if I had not moved items forward) to know to put more items on the shelf or something? So I might be screwing up their system?

I assume computers keep track of what's been purchased and what's been put on the shelf... but ... is the system that good? It could be foiled by shoplifters for example. Edit: or idiots taking an item but then later putting it back on some shelf 3 aisles away.

I have been wondering about this almost every time that this situation arises. Thanks

Edited to change "every time I go to the grocery store" to "almost every time that this situation arises "