60
That is all over my head, sorry. I can only theorize from a very simplistic perspective.
I enabled those blocks on
my top page for you to see though, without issue. I used them in the top center blocks as well as the bottom center with equal results.
Behind the mask, I am using the Mor.pho.GEN.e.sis - version 2.0 theme.
Again, I don't know what I'm talking about, but maybe you need the "/if" tag moved up and an "else" tag somehwere else.
Sorry I can't offer real help.
-EDIT-
I switched between several other themes, and they all displayed correctly, without the mystery block anywhere to be seen.
I don't know.