In order to make sure your package is delivered to the correct location your address must be up to date in your RunSignup account while registering. This can also be updated during the registration process. If you have already registered and need to change your address you also need to edit your registration information for the race.
To do this go to your RunSignup account, click on the "Manage Registration" link for Race Across Wisconsin, and go to the "Shipping" tab. There you can enter your address and update it as soon as you click the "Update Address" button.