Ex Messing with My Blog

Well, not really. He's just putting my blog address instead of his when he comments on other people's blogs. I think it's because one time I commented on someone's blog while on his computer and it's remembered my address ever since. I emailed him to inform him of this problem. I don't want people reading his comments, coming to my blog, and wondering why I seem to be an angry girl instead of the guy who commented on the other blog.