We try to grade with perfect accuracy. But, of course, we are only human. Mistakes happen and need to be corrected.
First, check the model solutions (link on the Schedule page under the examlet). If you suspect a bug in the solutions, post a question on Piazza so we can quickly address the problem.
Regrade requests must be submitted on Moodle within one week from when we post grades for the examlet.
Because final grades are due soon after the final exam, regrades for the final (and associated retakes and makeups) may be available only for a couple days. Details will depend on when the registrar schedules our final exam. The one-week rule still applies, but later regrade requests will need to be emailed to the instructors.