Might be nice to have a link to the thread and post that you say isn't as intended.

There are several different way to add a link to a thread. So how you made the link for both might help also. Some type their own bb code to make a link. Some use the link tool on the editor tool bar. Some drag a URL from another browser window after highlighting it. Or drag a object from other pages. And some just type in the URL and the editor automagically makes it a link. And probably more ways I've forgotten.