Denied from joining the server?

Today I logged on and saw this:
http://postimg.org/image/nwyydcxih/
What is this?

 

Most likely you were banned from just creative 2, did you do anything to break the rules?
EDIT: i think this happens due to command spam, where they then temporarily ban you from using commands.
It should be back online soon for you, if it isn't then i'm not sure :P

 

nope. I just logged on. after about 5 mins I was able to rejoin. Weird.

 

I believe it is NoCheatPlus doing some quick re-login thing but lagging and being caught a few server ticks behind.
tl;dr the server lagged, you logged off, the server stopped lagging but NoCheatPlus wasn't able to keep up and thinks you are using auto-relog hacks.

 

The system probably kicked you because you were spamming.
When you see a warning message in the chat, just slow down the chat.

 

@anratork59 I logged on for the first time and that message appeared.

 

Maybe someone else used your computer while you were away?

 

@anratork59
Maybe, my sister plays Minecraft and tends to go on my account and troll it.

 

She probably went on the server and spammed.
No worries though, the system doesn't give you any warning points, so you should be fine :)

 

@anratork59
Okay, thanks!