MotleyG and andrewilley,
Thanks for responding. Since reading your replies I've delved into the metadata tag issue and determined that was my problem. I've successfully been able to edit the tags on the actual mp3 files and since doing that the selections do appear when I search under Artists. It's still unclear what meta tags are actually necessary for visibility in PA and which are just incidental info. The remaining issue is that the parent folder, Radio, still does not appear under Album search. I should mention that my PA library was copied from my Windows 10 desktop and I can find no way to edit any metadata tag on a folder in Windows or on my Android phone for that matter. Is that somehow possible and is that why the Radio folder doesn't appear in an Album search? My Radio folder hierarchy mimics the other albums in the library: Radio folder\Artist folder\Artist mp3 file with only meta tags on the mp3 file. It's interesting to me that the Artist folder appears in an Artist search even though there is no known meta tag on that folder but the Radio folder doesn't appear in an Album search. Clearly, I still have something to resolve.
In a related matter, I discovered that my repeated Full Rescans apparently created multiple entries for everything. Unable to find any way to resolve this easily I deleted the entire library, restored the library and rescanned successfully. I'm sure there's an easier way. Is there a data file that can be deleted to accomplish the same before a scan is performed to avoid creating dupe entries? Also, can you suggest a free metadata tag editor?