Hi I have not had this (yet) but I just looked and wanted to see, if you go to that incorrect page and replace the "admin" with "avalon/page/index" does that work and take you back to the correct view?  If it does work, I don't think this would be a long term fix.  This is intriguing to me... I will dig into it more and try to figure out why this happens (so I can also know what to do when/if I see this issue)