I know what you mean. I'm not a big talker, but when forced to talk, I do find myself repeating. I have a terrible fear of being misunderstood in a situation, so sometimes, especially, when I think I am at fault, I over
explain because I'm nervous. It isn't that people have a hard time understanding me, becuase they don't ask, "what? Could you repeat that?", I'm just afraid they won't get it or they'll think something bad about me....(stupid insecurities) :x
Anyway, I think the repeating thing is definately connected to social phobia. I for one, sometimes feel like a total alien around other people, and I just believe they will have a hard time understanding me, when the truth is, we are really just the same. Don't know if that what you were referring to, but it's how I can relate to it.