Annoying sign in to itunes Store popup

So when ever i need to reset my phone or set up a new one, I get about 500 plus popup notifications asking to sign into an apple ID I no longer have access to. I believe this is due to the phone not being authorized for these older apple ids. This was never a problem in the past. You also cant find and delete these songs easily from your itunes music library, that are registered under these other apple ids. This could easily be fixed if they could just add a "purchased by" column in itunes, but no they want it to be as difficult as possible to manage your music. You have to manually click thru each song and select file info just to see who it was purchased by. No wonder nobody downloads music anymore, when you make it impossible to manage. Thankyou spotify. Good bye apple.