Add Custom Alert/Text Tones?

iPhone 6s Plus (Verizon) 128GB

iOS 9.3.1

I've tried this like ringtones but these short alert tones won't sync over from iTunes. These are former BlackBerry alert sounds, imported into iTunes as .mp3 files. I created AAC versions in iTunes, deleted the original .mp3 files, and clicked on each new alert tone to ensure it plays. They all work in iTunes. I changed the file type from.m4a to m4r, dragged them all into the "Tones" folder in Music > iTunes > iTunes Media > Tones. Upon sync these files go back to Music > iTunes > iTunes Media > Music > Unknown Album > Unknown Artist. And they do NOT get to my iPhone.

Any insights are greatly appreciated.