[Gamblah]

@afedchin
You found it.

I did some more testing with scaling.
Primary 100% Secondary 100% = Working fine on both
Primary 125% Secondary 100% = Full screen on both monitors but task bar showing on top of Kodi if activated.
Primary 125% Secondary 125% = Working fine on both
Primary 150% Secondary 100% = Messed up setting
Primary 150% Secondary 125% - Full screen on both monitors but task bar showing on top of Kodi if activated.
Primary 150% Secondary 150% - Working fine on both

Unfortunately I don't have any win 8 or 8.1 installations at this time but will see if I can do a installation of one of my drives to test scaling out.
Windows 7 worked fine with this monitor setup but had to run at 150% on both monitors as it did not support independent scaling.
For Windows 10 at this time I will run primary at 150% and secondary at 125% and live with the "larger" setting on the secondary monitor.