I, too, say sorry frequently, but for a different reason. I am an analytical individual and have a tendency to inadvertently offend, so I say it to clear the decks and avoid hard feelings.
Still saying you're sorry even when you're not at fault, still counts as being the bigger person it doesn't at all mean that I'm not standing up for myself. Sometimes you have to be bigger than that.
Yeah, I mean it's pretty big to apologize for something that wasn't your fault.. it all depends on how you look at it really, but this is my own personal opinion so we can agree to disagree.