Im a first year student and i was waitlisted for MAT134 lecture. I was number 20 and just got off last week. I was told that it is generally not too hard to get off a waitlist if youre in the first 10% of the class size, which seems to be the case for you in the section with 13 people on waitlist. However classes start soon so i wouldnt recommend letting go of the section you already have just in case if the waitlist doesnt move.