24 Hz and 12-bit HDMI deep color mode bug?

http://community.wd.com/t5/WD-TV-Live-Live-Plus/8Bit-or-12bit/m-p/48783/highlight/true#M12156

The fact is that the source is no more than 8bits so the TV is not getting any more information to make decisions on the color than an 8 bit set.