I dragged my old iTunes Music folder from a PC external HD to my new Mac iTunes icon on the dock and it copied my music over to the Mac, but some of the songs didn’t stay with the correct album. For example, Justin Timberlake’s Future Sex album got separated into multiple albums, probably because in some of the songs it’s credited with Justin and other artist and that made iTunes create another album. How do I consolidate the this? Track numbers won’t conflict since in one album with 3 songs the tracks are 2, 5, 8 . . .