We are using the Richshaw Rally theme this year. In our books it lists the 12 Disciples. It lists a Judas and a Judas Iscariot, but no Thadeus. Where did this other Judas come from? In all of the Bibles I have looked in and the way I was taught it was Thadeus. Can anyone explain this to me? Or is this a typo?

I don't think it is a typo. Some lists of the disciples include two men named Judas. See Luke 6:12-16.

This is from the NIV:
Luke 6
15Matthew, Thomas, James son of Alphaeus, Simon who was called the Zealot, 16Judas son of James, and Judas Iscariot, who became a traitor.