Ticket fine with an incorrect offense?

I was driving a U-Haul Van that's a 2-seater. I was literally only going 800 metres to pick up an old couch. Had two buddies come with me, so one of them sat in the middle console (no actual seat or seat belt). Yes, I'm aware I was wrong. But it was such a short distance, and with the gridlock in Downtown Toronto, I can barely go over 30 KM/H. But lesson learned.

Cop who was just patrolling on foot stopped us and gave me a whopping $425 fine. On the ticket it's written the offense is vehicle is over maximum capacity, and wrote it's contrary to Toronto Municipal Code Chapter 546. I looked up the chapter and book, and the Chapter he referenced (and code in general) has nothing to do with maximum capacity (but rather that vehicles must have a max capacity of 9 passengers).

Is this something that's fightable in court if he referenced the wrong bylaw? Debating if I should go for 'Early Resolution" or straight to "Trial"? I don't mind paying the fine, but not the full amount.

I have clean driving record. This is the first time I've ever been pulled over by a cop.