I was wondering where to sign it, as I found this on buffalo checklist
APPLICATION FOR PERMANENT RESIDENCE IN CANADA (IMM 0008)
Check that it is complete and signed by the principal applicant.
Hey uwindsor you're right! I didn't paid attention to that detail before !
I think that the mistake is within the local visa office checklist, because the CIO checklist is correct.
Anyway, there's no signature required in the IMM 0008 (generic).