I'm not sure what you mean but you can sort the song in a playlist by clicking the bars on top of the playlist e.g.. Clicking artist will sort the list by artist A-Z clicking it again will sort it Z-A and clicking a third time will make the playlist go back to unsorted.
It's not sorting but it did at least help me a little. You can drag the playlists to change the order. So I was at least able to put the ones I use the most to the top of the list. Really ridiculous they don't have this feature. AND why is it that when I sort it on my android device it doesn't just go ahead and give it in the same order on my computer? They really need to work on