Yosemite Background Resetting

[RAP19]

Hi, every time i reboot my Hackintosh the background (Random and changing settings) default every time.

 

[defbref]

Do you have two displays connected? It appears to be a bug with multiple displays and separate spaces. Switching Displays have separate spaces off in Settings - Mission control should solve it, but may leave you with other frustrations of full screen apps blanking the other display.