This situation appears to be a Dell goof in their Windows 10 implementation. In select the Blue Yeti , and UNCHECK "Enable audio enhancements". In short, for USB stereo, do not enable audio enhancements under the Recording tab. Be sure to do this for each stereo recording microphone, including internal and external webcams. 
I have tried everything I can think of to get my Blue Yeti Mic to record in stereo.  I am using Audacity and I have all the settings set correctly.  I am using the same settings on my desktop computer and the stereo recording is correct.  I have all my settings on this laptop set to the same settings on my desktop, but when I record in Audacity or even the regular windows voice recorder, you can tell that the sound is only recording from the left side.  So the stereo feature built into the mic is not being recorded correctly.  After everything I'm trying, I am wondering if anyone can tell me if this computer's USB port will record in stereo or not?  I am at such a loss and wondering if I need to get an external sound card or something.  Thanks for any help!
Inspiron 7506 2-in-1, Yeti Mic not recording in stereo