File uploads are required fields

We have the addon for registration fields for events and we are using some file uploads as well. We only have the first file required but when someone submits the form it comes up with an error that 2 and 3 are required as well.
You can see how this works here: https://67.227.186.56/~jansenartcenter/purchase-checkout/?uts=1487784730#checkout

Thanks