frannie84 on "Username linking to wrong blog"

I added a secondary blog to my account which I will be working on and at the moment has nothing on it. When I post comments on other blogs I notice that clicking on my username frannie84 links it back to my secondary blog. When I posted I did so under the primary's dashboard while browsing the tags and I can't find any way to force it to link to my primary blog instead. This isn't an issue when I can enter my url manually, but for many wordpress blogs it doesn't work that way.
How to I permanently force my username to link back to my primary only?
Thanks!