If you have created a team, you are designated as a team owner. We decided to not allow team owners to change their team as you may have other members in that team.
Therefore, to change teams you will need to send an email to challenges@stepjockey.com to request our technical support team to release you as a team owner.
You will need to include the email address that you used to sign up for the challenge - our support team will take it from there.