I get the same problem. Everything seems normal until I turn off detailnames. Then every bot is [#]Unnamed. I turn it back on and it pulls names out of the txt file like it should.

One other thing I have noticed is that when the server cycles to a new map, the bots names will look like [POD] [POD] botname (67) (67). Everytime the map changes it adds another iteration of [POD] (skill) to the name. This may have been brought up before, but when I search for [POD][POD] I get nothing because of the braces.