Hi!
I just wanted to note that my husband was this way (now is medicated). It wasn't a problem when he lived alone, he could have things how he wanted. But after we got married and had kids it got to be a problem. (Kids can be somewhat messy! ) Anyway I think it becomes a problem if, like others have said, it causes you too much anxiety or gets in the way of living. It also can become a problem when you have to compromise, work with others who may not be that way. His cleaning got out of hand and in the way for the rest of the family (cleaning always came first). But, he did get on medication and is doing better now (he can be a downright slob sometimes!)

Also, my 14 year old son has the same thing as you do. His room is perfectly organized, everything has a place, One night he couldn't go to bed because his scissors weren't in the right place, we had to search everywhere, and when I moved something to look for them, and didn't get it precisely back in the right spot (I'm talking millimeters) he would adjust it. I think he has had some problems in school due to having to have things (numbers) lined up perfectly. It hasn't gotten to interfering with his life too much, and I've always told him to let me know if he needs to work on it.

Hope this helps.
Take care.