Possible bug: Comms not showing up in Community Neighborhoods?

I just noticed today that several of the communities I had previousy added to my Community Neighborhood at /kaesaria had disappeared. Also, my comm isn't showing up on the "About" page of other comms that I know have added my comm to their neighborhood.

I went through and re-added the comms to my neighborhood, but there still seems to be a delay before they show up (and in a couple cases they're still not showing up at all). It's not a huge deal, just really weird. (And I don't want people to think I removed them on purpose!)