title on secondary display in View not showing up in title tag

I have a View that runs my blog, and the main (first and original) page display has a title set on it which comes through nicely via the token setup in Metatag. However, I have overridden the title on a subsequent (secondary) page display, and that title does NOT come through via Metatag. The title from teh primary page display doesn't come through here either. I am assuming this is a bug, but it could be I have to do something special to make it work...

Main display: http://hexatrope.com/blog

Secondary display: http://hexatrope.com/blog/category/branding