I can't drop music from my itunes on to my created playlist on my iphone?

:( for some reason i can't drop music onto my playlist on my iphone. I can drag witch ever song but it won't drop. It only lets me drag and drop music onto my iphone and it will be there just not on my created playlist. This has never happened till now. The sync box is checked aswell as selected playlists, artist, albums, and generes and both inlude music videos and voice memos are checked? Can some one help me out on why i can't drop my music onto my playlists on my Iphone

Mac based systems are awful

  • New itunes music goes to bottom of playlist? When i download new music and i drag the song into my playlist, it goes all the way down to the bottom so itll be like 600 songs down and i have to drag it all the way back to the top. How do i make it so that when i put a new song into my playlist it goes to the top and becomes song #1?
  • New iTunes / iCloud music - how to get a playlist onto iPhone? I've updated my phone and now the music app is COMPLETELY different. I have no option when syncing my phone to put playlists on there, it just says "iCloud Music Library is on". I don't even know what that means or how to turn it off. Please can someone help me and also explain why is this so complicated? Damn you Apple!
  • If I created a new itunes account will it transfer my old purchases? I recently got a new iPhone, and I don't want icloud and all of my old app purchases on my new phone. If I created a new itunes account will it still use my old icloud?
  • How to transfer music playlist from iPhone 6s to iTunes? I know how to sync a playlist that i made in itunes onto my iphone. But i don't know how to add a playlist into itunes that i made on my iphone.