I agree. I inferred the same from it and wasn't going to send schedule 1 myself, until i was told by Fedex guys. I might not have believed him even because to me, written instructions carry more weight always.
Unfortunately, i had been bitten once before i.e. my application was returned earlier stating "temp resident visa forms required for kids" although it is clearly mentioned 'they were not required' in the checklist i.e.
http://www.canadainternational.gc.ca/pakistan/visas/54_1.aspx
Interestingly checklist also states, "[IMM 5257 - Schedule 1] required for all applicants 18yrs and older"
So basically, there are mistakes with the docs with embassy and there is no pleasant way getting around it. Besides, if there was an additional form which they do not require, such as schedule 1, they would simply throw it away (in case of paper application). Better safe than sorry.
By the way, the checklist that Fedex office had WAS DIFFERENT. It was taken from the international.gc.ca (international page) and not the country specific link to Pakistan although requirements and timelines significantly vary by country and every embassy maintains its own page. However, upon asking Fedex told me, they and embassy both know there are mistakes in the original checklist and docs, hence they use the one from international page which is more close and recent