I don't have any insider info or anything, so this is pure speculation, but lefaa has made dozens of accounts. He might be marked as a smurf which makes his ranks default to higher.
You need to understand that Valve doesn't really care about cheaters. Literally every Valve game is the same. Filled with cheaters. They don't moderate any game they've made in the last 20+ years so don't expect any different except their very crappy automated systems that don't catch super...
Valve literally does not care. This is a company worth tens of BILLIONS of dollars. If they cared they would've done something about smurfing and cheating years ago. Every Valve game is the same un-moderated cesspit of cheaters and smurfs.