There is a bug in vorpX 0.7.1 when you select an Oculus profile in the vorpX config app. Set the option to “Do not use an Oculus profile” (the default value) instead if you use an Oculus profile and dial in your IPD manually.
This bug leads to wrong distortion and IPD settings unfortunately when using an Oculus profile. Not sure yet what the problem is exactly, but this will be fixed with the next update.