MC Ford

Updated my 2016 Escape's SYNC3 to 3.0v20204. Still having issues with cam works sometimes and not others. Found TSB 21-2175 on reprogram of the APIM module. I used to be a Ford service writer so I understand a lot of this. It says once the tech downloads to USB it is used on any vehicle needing it. Plug usb in and let it work. About 30 minutes. don't have to babysit, watch or scan. when finished return to owner. My question is was the APIM update not in the SYNC3 update? And second why are my local dealers saying 1 to 3 hours depending on net speed...it's USB based. We talking a month out to do this. So is the APIM update different? Thanks