Okay, let's think about this for a minute.
Your computer-- your HOME computer and the SCHOOL computer... are both being used by 'KyuubiForte', correct? But, no, wait, your computer is broken, and you're using your DAD'S computer... so Kyuubi is using your dad's computer as well? No, wait, that's not right, he's not using your computer...
So you're telling me he's somehow acquired your COMPLETELY UNIQUE TO YOU IP and is using it, coincidentally, on this EXACT SAME BOARD which is rather hard to find?
My BS-Radar is going haywire, here.
So, as far as I see it, you have two options by this point:
1: Fess up and take your ban like a man. Hell, if you apologize and promise to never do it again (And trust me, we'll be watching), we MIGHT just let you stay. Maybe.
2: Continue these 'Clever excuses' which can easily be seen through by a burst of logic and an IP CHECK, and thus, make yourself look worse in the process before we permanently ban you AND your IPs anyway.
What's it gonna be, eh?
-Twi