Playlists Appearing Multiple Times

[mopac]

I have an iPhone 6 with iOS 12.   It has 25GB worth of songs loaded on it (roughly 5,000 songs).  I know this is too much for some of the voice command features.  But I generally just navigate songs with playlists.  And I don't have but 2 or 3 dozen playlists at any one time.  Most are recently purchased albums off iTunes and I have a playlist created for each album and it's inside a folder of "Current Albums".  On my 2010 Nissan when I connect the iPhone all of the playlists, whether in a folder or not, are essentially at the top level of playlists.  Essentially there is no nesting of playlists - every playlist is seen alongside all others with no hierarchy.  But on my 2018 Silverado with the non-nav infotainment I'm seeing 2 or 3 duplicates of many of these playlists.  Also only one of any given set of duplicates has songs underneath it, while the others are empty.  Not all of the playlists seem to be duplicated, and some that are have more duplicates than others that are.  Does anybody else have this going on?