Screen Saver reverts to National Geographic
Several times lately (Yosemite only???), I have discovered my screen saver has reset itself to show National Geographic photos. And they are usually set to show both my iMac and my second monitor the same photos.
It's easy enough to set back to my desired iPhoto library. But I wonder what causes it to be reset?
What I haven't figured out is what to do when both monitors are displaying the same photos. Eventually that problem fixes itself. Nor what to do when it starts with the same photos in the same order. (I have a hot corner, and have been testing after I reset it to use my iPhoto library, and each time I turn it on, I get the same photo sequence as before - on both monitors).
I just tried it again - the third time since I started this message - and it's back to National Geographic.
I set it back, this time telling it to shuffle, and both monitors showed different photos as desired. I should have checked that earlier. But why doesn't my setting stay?
iMac, OS X Yosemite (10.10)