Basically all As but still bottom half of class ranking?

I'm an M2. 14/16 of my graded classes were As, the other two solid Bs. I randomly fell to third quartile recently. 15/16 of my classes I was overall anywhere from average to well above average since we know averages for each test. Idk how one slightly below average class brought me down so far. Is this something appropriate to bring up to administration for a possible error? Is there other stuff that goes into calculating class rank? What's the point of class rank if everyone apparently... Basically all As but still bottom half of class ranking?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Medical Students - MD Source Type: forums