Their model was +9 GOP while the current electorate is +11 GOP.
Looks like Sinema could still have the lead, just smaller than +5.
Remember AZ-08 had a +20 GOP (48-27 GOP) mail-in advatage but Debbie Lesko only ended up winning by 4.8.
Have you read the Article. Their Pollster admitted the AZ Senate Race "Leans R" at this Point with new EV Data. Yes, Hillary won Indies but not by almost 20 Points like "Data Orbital" was suggesting in their Poll.
Considering you have that username, you should know better than to try and read too much into the early vote (FL-2016, NC-2016, GA-06-2017, MT-AL-2017, etc.).