Having a hard time reconciling my math...

In my category, 23 people senior to me bid out and 4 senior bid in (net of +19). 10 people junior to me bid out but 12 people junior bid in (net of +2). Did I move up 19 spots? 17 spots? 2 spots? Does that mean the category shrank? What do some of you say who have been around the block longer than I? Cause I'm a little confused here...