For what it’s worth, I interviewed at a mid size municipality outside the GTA last year as a 5 year call. The questions were quite general if I recall: “describe a situation where you” type stuff and mostly not substantive in nature. Knowledge of municipal or planning wasn’t a large factor in their hiring decision but they did ask some basic questions to get an idea of your level of knowledge.
I was accepted with stats almost identical to yours (3.7 cGPA [3.72 with final winter term marks] and 158 LSAT). Though I was not waitlisted, I recieved my offer of admission later in the cycle during the last large wave of acceptances. Take care when preparing your personal statement and sketch, as well as when selecting those who will write your reference letters and you will have a legitimate shot at an offer from Osgoode- especially if you are able to improve your LSAT a few percentile points.