Droid Turbo 2 Why did my Contacts individual ringtones disappear?

[AC Question]

I had individual ringtones set on my Droid Turbo 2 for several contacts and they are now gone.

My manual says that I should go to Contacts, pick a contact and open the Menu in the upper right corner. Then choose ringtone....but that option is not there! All I have is Delete, Share, and Place on Home screen.

What am I missing???