From what i've gathered, was that the auto detection can flag your account, but they still have to manually ban it themselves to prevent from auto banning innocent accounts.
I know what a chainban is. My accounts were banned on those 2 ip's. I bot with the expectation that I will get banned at the end of the night (When Jagex comes into work and does their bans manually), so I generally trade over every 2-3 hours to be safe, and at the end of night, I trade off the remaining and sell everything. I was taken by surprise because the accounts got banned during the hours that isnt their "schedule".