No completely single. Parent sponsored is a widow. So that 1+1= family size 2, in 2021, 2022, 2023 till now. So why in 2021 it is changed to 3?Are you single? (i.e. not previously in any marriage?) Were you in any common law relationship? Are you still undertaking anyone that you sponsored before?
How about your parent? Is he/she not in any relationship and has no dependent?
All Tax information shows no dependents. What do you think? This is a grave mistake, question is how to corrent or appeal this disastrous and wrong decision?