FIXED:
Hi Peter & anyone reading my post, I found out what the problem was, and now ST3 is working wonderfully well.
I'm not sure if it is a default setting of a new installation (New Mac) of OS Sequoia 15.x or the OS update itself, however, after looking through my "Settings" then under "iCloud", i found that the "Access iCloud data on the Web" was turned off! Sync was actually downloading the files to my Mac but the playlists and song titles etc were not showing up in the App.
Sorry for any confusion Peter, I have loved the is App since Scott Uhl (hope i got it right?) brought it to my attention.
Thanks again