That's the same thing that happened to me. I hope that you get unbanned.

 

Hello Hendrickson. You were banned because we do not allow a user to play on the server if another user from their ip is currently banned. Here is the rule about that:

Clause 2 - Multiple Accounts

• Multiple accounts are not tolerated on this server. If you are caught using two or more Minecraft accounts to benefit you, all accounts will be banned and you will lose the ability to play on the EcoCityCraft server permanently.
• Multiple accounts on the same internet connection/IP are allowed so long as the accounts are used by different people.
• Users may be questioned for being on the same internet connection, or, in cases of suspicious activity and bans, immediately banned regardless of the reason for the same connection, to be appealed with an explanation.

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Unfortunately I cannot unban you until your brother posts a successful appeal and is unbanned. When MinecraftParkerH is unbanned, you may reappeal and you will be unbanned as well.
http://www.ecocitycraft.com/forum/threads/ban-appeal.83426/#post-408648 <---Clou44's response to your last appeal.

Denied. Brother still banned.