Same here. C.Fn-08 just displays -- Might be for some other XT unit for another camera since it's mentioned the Fuji XT one goes to C.Fn-12 for RF ID setting on them and seems redundant given the C.Fn-10 (Highest on ours.) is same RF ID thing on ours.
I don't know what C.Fn-09 does given it is on or --
C.Fn-10 goes 00 to 99, but I left it at 00. Online download memo says it is for some RF ID tuning value.