1. Schedule A: I would like to point out that to look at all the dates in your Schedule A since IRCC does request applicants to fill in forms afresh. So for example in
Schedule A, Personal History and 12. Addresses
....From.....To (month and year) make sure you remember to update the period for the To field.
Also ensure you do not leave any gaps. In my case, they asked me to get my husband's Schedule A corrected because there was a 3 month gap with no activity reported.
2. I am not sure what they mean by citizenship and resident document information. I think for all the countries you visited/travelled to, provide copies of visas and immigration stamps at Entry and Exit.
For your country of citizenship, did you provide a Passport and National ID copy. Do you have dual citizenship, if yes, provide those copies as well.
3. PCC Simply put. Any country you or your dependants have lived in for more than 6 months, that includes your country of citizenship or residence. If for example you traveled from UAE to another country, so long as you did not stay continuously in that other country for 6 months, then IRCC does not need a PCC for the country you visited.