I think, part of the reason for your neat tendencies could be your comfortability within your routines? Whenever something does not fit within your routine (ie. toilet paper), you have an urge to fix it and put it back within ur zone of expectation?
Another could be a force of habit. I used to work at a restaurant, and it became habit to clean up tables fast and pick up after people. After working there for a few months, when I came back to my apartment I would automatically pick up things and clean things up (I'm a guy who's usually relaxed about cleanliness mind you). So...perhaps it could be a mixture between routine and habit?
*Edit:* You're perfectly normal. Forgot to add that
