Hi Anthony...
MY wife has the same situation for no reason,,,
the interview was awful ... from the beginning the officer didn't want to listen ,,, she gave him the most important proof which is the stamp translation cost us around 250 $ and he didn't even bother to look at it ,,, he just through it inside the file ...
kept on asking her why you returned back home after landing ( and she told him I was finishing my stuff to come and live for good )
why you visited usa ( she told him the truth its just for few days to see some relatives there )
and at the end he said we have concerns about residency and work and sent her cit0520 ...
till here its fine ...he had doubts ( even if he looked or bothered to look he will find out )
but the thing is after she submitted the required documents which was ( entry/exit report from back home,,,,, medical claims (which alone shows she on doctor visits on monthly basis ,,,,, CRA Reports )
since two months now ..... why is the delay ????
it will take them less than 15 min to relief all their concerns if they just look
why the application turn now to be non routine and you don't have the right to ask before 36 months
I have no idea ....