yeah the moment you go into dust you pretty much just gave up your high rank. half a year ago I was at rank 250 and was slowing geting higher but I started going into dust and now I'm at 3,500.
I was just happy to keep my score at ~1600 on dust2. Then I switched to RPG and never looked at the stats again.
EDIT: Also jason, hlstats wasn't intended to be used for INS. It's for games where when somebody is really good it will be difficult for that noob to kill them one on one. It's not assuming a single hip fire shot into the knee will kill someone.