Sounds like a plugin issue to me, what plugins do you have installed? PS: Please don't add a poll if it doesn't contribute anything to your post
You can't expect people to help you with a plugin issue if they don't even know which plugins you have installed. Chances are, someone gave you a troll plugin.
If there's so many you don't want to write them out, why not do /plugins and then copy/paste them here or take a screenshot?