Hello, i think that our achievements are recorded for every wastelander just displayed for the No. 1. It would be a neat idea if a server gave the info about your actual position (2, 100, 9999 etc) in your PipBoy so it would have 2 levels:
PipBoy>Statistics>
1) the name of the stat/achievement (most deaths on the server)
the name of the No. 1 char in the stat
2)your place among other players of the server