My sons both do stuff like this. DS6 used to have a good night ritual that was so long that we finally just said, "No. Too much." He adapted.

If it's OCD, it's not the "interfere with life so you can't function" variety, so I don't think it's troubling. But mostly I think it's just stuff kids do. If it gets worse or begins to interfere with life, then worry. If not, then my inexpert advice would be to ignore it.

Kriston