I am not really sure why mine doesn't show Canada. I checked my application, luckily I have saved screenshots, and I put Canada as Country of Residence. Anyways, I have sent a web form asking them to fix and included many proofs.Mine says Canada on all the GCMS notes I got.
TBH, I am not really surprised with their lack of professionalizm, an error like that should have been noticed and fixed a year ago! Especially that I am positive it isn't my mistake.