After more testing I am finding that invoking oyranos-monitor does not update the video card gamma table correctly for the non-primary monitor on my dual monitor xinerama system. That is the primary monitor will get the corrected gamma table but the second monitor does not.
$ xprop -root | grep EDID
$ xprop -root | grep ICC_PROFILE
Shows that both the EDID and ICC_PROFILE atoms are correctly set for both monitors after running oyranos-monitor. So the only issue is with correctly setting the video card gamma table(s). Using dispwin or xcalib directly to load the gamma table for the second monitor using the same profile works.
I am using the last version of oyranos 0.1.8.x from the downloads area. If there is any specific tests or information you would like please let me know.