Repeating a college course or AP credit must be marked as “repeat” on the medical school application. Presumably, at least some medical school application readers will see that as grade-grubbing.
Colleges do not like it when native or heritage speakers take the introductory language courses, although some native or heritage speakers have little or no reading or writing ability and need to take those courses to learn reading and writing if the school does not have “[language] for heritage speakers” courses that focus on reading and writing.