A different toilet paper question

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OK, we've seen the over/under discussion a million times, but this is a bit different. When you are in a public restroom, sometimes the TP holder has a "spare" roll in it so that if one runs out, the other one can be used. Now, sometiems the spare is just on the top of the tank and you have to put it in the holder or just put it back when you are done. So, in this case, do you put it in the holder the correct way or do you just put it on top? Then there are the ones where the spare roll comes down out of hiding when the first roll is empty. I like those because you don't have to do anything to them, it just happens. Here in our office building, we have this kind where the roll is to the side and you slide over this door to get to the spare. Now, you can't slide over the door until the first roll is empty because the door slides into the space where the old roll should be. If there's a full roll in the first side, it wont slide over. So, once you've slid the door over and started using the spare roll, the janitorial people know it's time to replace the full roll. Well, this morning I noticed that they put the full roll over so the door goes back to block the spare. What I thought was strange was that they left a half-used roll in the spare side. I thought it would make more sense to put the fresh roll in the spare side and put the half-used roll in the "normal" side. Now, these are not your household rolls of TP, they're HUGE, like 3 times the size of what we use at home. It's not like the TP disappears every day, it takes a while. But, if they have a half-used roll as the spare we are more likely to use it up faster. Maybe you all have a little more insight on why they would put the fresh roll on the first side and not move the used roll over there...