When I choose show in front office list > never and then click the "save changes" button my new setting is not saved, but the blog in question remains as "public" which it has been until now. Not sure if this is a bug, but the mods can move this post to the bug reports sub-forum as they see fit.
ETA: I was successful in changing another blog from "never" to "public" but it will not change back to "never" now.
V 6.9.6
Yeap! Can't change to never