If you aren't getting points for those jobs, and your history has no gaps, you don't have to show them. Apply a standard of reasonableness here.
For example, you were in school for two years, and you occasionally worked as event staff at a convention center to make some extra money (assuming you're legally allowed to work, let's say you were in your home country). You don't have to talk about that since no one cares that you worked two weekends every three months to earn some beer money. Your primary occupation during those two years is "Studying".
Misrepresention is when you lie/omit something that is material to your application. It's not misrep. if you don't tell IRCC about the time you made $50 teaching the neighbor's kid some calculus while you were home for a summer vacation.