You were warned and kicked by the server for spamming before the ban. The system is fine, it's not overly sensitive and it gives plenty of warning before bans.
Here is the chat log for reference.

Evidence:
Spam ----------------------> [2017-02-21 22:49:52] <omg_a_gecko> ticks
Spam (Warned) -------------> [2017-02-21 22:49:55] <omg_a_gecko> ticks?
Spam ----------------------> [2017-02-21 22:50:03] <omg_a_gecko> joke?
Spam ----------------------> [2017-02-21 22:50:12] <omg_a_gecko> joke?
Spam (Warned) -------------> [2017-02-21 22:50:19] <omg_a_gecko> joke?
Spam ----------------------> [2017-02-21 22:50:25] <omg_a_gecko> joke?
Spam ----------------------> [2017-02-21 22:50:34] <omg_a_gecko> ughhhh
Spam (Kicked) -------------> [2017-02-21 22:50:36] <omg_a_gecko> ughhhh
Spam ----------------------> [2017-02-21 22:51:03] <omg_a_gecko> lol at c#
Spam (Warned) -------------> [2017-02-21 22:51:04] <omg_a_gecko> lol at c#
Send Rate -----------------> [2017-02-21 22:51:07] <omg_a_gecko> joke?
Spam ----------------------> [2017-02-21 22:51:16] <omg_a_gecko> joke?
Spam (Banned) -------------> [2017-02-21 22:51:18] <omg_a_gecko> joke?

Your ban will last 24 hours from this post, in future I would advise you to pay attention to the automated warnings and kicks.