Restore from iOS 8.4 - Prompts to Sign in to other User's iTunes accounts

[im_to_hyper]

Sorry for the long title -- just not sure how else to describe it!!

So basically, what I did was:

1. Put my device in DFU mode.
2. Perform a fresh install of iOS 9
3. Restore from my backup from iOS 8.4 Beta 3
4. Everything works great - except I get multiple random pop ups asking me to sign into three different iTunes accounts. I don't recognize the e-mail addresses accounted with them.
5. My only thought is that at some point I had copied friend's music back in the day, and even though it was DRM free, iTunes Match is now wanting me to sign in as the original user.
6. Either way - just wondering if anyone else is experiencing anything similar before I submit a bug report. It was a very strange restore path (Beta --> Beta) so I'm honestly surprised it's been this smooth.