But still processing starts on the day they received your file so no worries at all!I too have a similar situation. I applied in April 2018 but I received AOR in December 2018 ( eight months later). Although complete Application and all the required documents were submitted at the time of Application. Mine is a paper Application and in the AOR they clearly mentioned that they received my Application dated April, 2018, I hope my process starts from then. I see most of the applicants received AOR on an average of 3-4 months. I seriously don't understand these discrepancies.