Mike,
I called Curt Venable who said he got a message from Don's nephew Cody Mabe, that the paperwork was denied and something to do with the name, but he hasn't been able to get in touch with him to find out exactly what it was.
I did the paperwork and called before submitting to ensure there were no problems with Don's last name of Fee, but the grave has step-father's last name of Tonker. Cemetery said it would not be a problem, but I'm thinking maybe the problem was his Mom's last name of Tonker on the paperwork. Won't know for sure until Cody is contacted to find out exactly what the problem is.
Thanks for the offer of help, will let you know when I find out...
Here is a photo of his grave: