My registration started the 26th of the month I was released from jail. So I would (assume) that yours is similar.
Since your conviction was pre-SNORA you should be at 10 yrs. I am kinda in that same boat as you but I had a CP dissemination too, so I am at 25 yrs. When I was sentenced in 2004 both were only 10 yrs. I was inside for 3 yrs so my registration started in 2007. This IS my 10th year. We shall see what transpires.
As of 17:45 Dec 18th there has not been a reply from the Muniz team.