There’s a glitch in how the app displays Tidal playlists. Self created playlists are double displayed (Tidal originated playlists display properly). See below (with comparison with a different streamer system which displays correctly)
I’ve noticed this too… slightly odd
Good to know it’s not just me
I foolishly deleted one of the doubles (or so I thought). The other disappeared too. A glitch that needs a fix, methinks.