Why does my iBUYPOWER keyboard randomly type the same key like 15 times when I click it once?

There is a "turbo" key that nothing on the internet really talks about. I'll type a key and it will come up several times. For example (tttttttttttttttttttttttttttt) from just one pressing of key. Also sometimes it will seem to "lock" up and not type anything. This correlates with the Num key light going off for a second or two. Please help!