I've attached two screenshots of my play queue while playing the first playlist. You can see the song playing as well as the following 8 are in the first 10 - I had already played one song which was also in the first 10. After those, everything seems to be shuffled randomly.
For what it's worth, I recently tried creating my own playlist and it seems I don't have this issue when playing that one.
Editing to add: not sure if the screenshots look huge to everyone else, but they do on my end...sorry if that's the case for others, not sure what happened.