i think so we have to pay the fees again when we did the applications it was only the applications fees now with this document they are asking for the PR fees. dont worry if any of the mmebre dont come they do refund the money.
see below how much you have to pay.
https://eservicesak.cic.gc.ca/epay/order.doFamily Class
Sponsorship application (per application) $75.00 Principal applicant $475.00
Principal applicant, if less than 22 years of age and not a spouse or common-law partner (including a dependent child of the sponsor, a child to be adopted and an orphaned brother, sister, niece, nephew, or grandchild) $75.00
A family member of the principal applicant who is 22 years of age or older, or is less than 22 years of age and is a spouse or common-law partner $550.00
A family member of the principal applicant who is less than 22 years of age and is not a spouse or common-law partner $150.00