Multiple Bans means you were avoiding the ban. You were accused of making another noob account to continue playing around your ban. From what I believe it goes like this. Classic is very strict.
1st Offense: Warning
2nd Offense: 170 Hour Ban ( 7 days )
3rd Offense 2,000 Hour Ban ( Around 3 Months )
4th Offense: 6,000 Hour Ban ( Around 6 Months Ot Half A Year )
5th Offense: 9,000 Hour Ban ( 1 year )
6th Offense: Either another warning or permanent IP ban.
Sometimes you can get multiple warnings if your offense is nickname/status violation but harassment follows the rules above. This is what I think because my friend ( who I know in real life ) made it to 9,000 Hours.