Guys before making assumptions for the sorting technique, please assume the practical situation of Service Canada:
1. The calls are coming from a centralized location, not specific centres
2. One of the applicant in forum mentioned he talked to service canada and they told him they have distributed candiates list to different employees and they are calling using their phone number, hence private numbers
3. Think of yourself manager of all the employees and you have to distribute the applicants list to 10 employees, so as expected the service canada manager did not want to spend more time thinking of the order, he/she just distributed randomly and started eating chai pakoda
Recommended way would be to 1st distribute Feb AOR, then March and so on... But we know what's happening
Let's not call them and waste their time, instead tweet IRCC so they should know the rules are not being followed. If all of you guys tweet instead of making random logics, who knows we build a pressure on IRCC and they might talk to service canada regarding this!