Hi Lux
I have that same problem with my "favorites". I assume you're using Internet Explorer. Its an IE issue. What I have to do to clear out the favorites is, go to XstreetSL in a differant browser and remove the favorites from there. It works for me. I also have the same issue with the SLurls as you do, havent gotten a fix for that one yet.
Owner, Ink Blots, come by and get Ink'ed