You have a flagged IP that's why there were banned, you can't bot more than 1 account per IP, that's suicide
When Jagex bans, they ban whenever they want. There are no set days that bans occur apart from when you bot your accounts fate is in their hands. Could be 2/3 days or 2/3 months. If we knew why and when Jagex ban people botting would be a breeze.