Thanks a million Welafever!! Your suggested solution got me 99% of the way there.
1) Instructions for deleting playlists from my iphone were clear. The only thing that threw me was when I pressed the 3 dots and chose "Remove" I was then faced with 2 options which I don't think are very clearly worded: 1) "remove downloads" or 2) "delete from library". I chose the latter which appeared to be the right decision.
2) Instructions for deleting playlists from iTunes on my Mac didn't work - initially. In fact, I had tried the old "right click" in the first place and had been surprised it didn't work for me. But I figured out why...There was a little drop down arrow just above "Purchased" on the left above my playlists appear which allowed me to toggle from "Music Playlists" to "All Playlists". Once I changed from "Music" to "All" I was able to right click which brought up a full menu of options, including "Delete from Library" at very bottom of this menu. For some reason, in the other view, I wasn't getting a "Delete" option. However, since deleting all my duplicate playlists, I now seem to have "Delete" as an option in both toggle views. Weird.
Thanks again Welafever! 🙂 🙂