I just compared the one you linked with the one I sent in a month ago and indeed there is a difference.
Mine says, "You do not have to submit police certificates now. After your application is received, you will be requested to a) submit a validated Schedule A: Background/Declaration (IMM 5669) form for yourself (and any family members 18 or over), and b) provide police certificates."
Yours says, "You (the principal applicant), and any family members 18 years of age or older (who are not Canadian citizens or permanent residents), must submit police certificates from the following country or countries at this time, unless indicated otherwise on the police certificate webpage."
Check that link and see if your country is on the list of countries that need to send them right away.