Filled shapes turn white when on top of other filled shapes

[Nancy Aaron]

I am stymied. I'm not a power user, but pretty close. Why are these shapes turning transparent white when placed on other shapes? I've tried changing the CPU vs GPU view, quitting & restarting, copy & paste, etc. 

Please help!

[pixxxelschubser]

Please show your Illustrator file with selected (group/items)? and Layers Panel and Appearance Panel and Transparency Panel (this panel with options visible)

[tromboniator]

Perhaps you have a Blending Mode applied?

Peter