I'm working on the billing module and I am having issues. 1. Resync creates duplicate my products and clicking order does nothing.
The order plugin is sending the admin an email. Did you receive that mail? Regarding resync, I don't have that issue here. I will make a note in our internal bug tracker to test that further.
The email should be sent to the address that you have set in the company settings of the billing module.
Take a look at the mail.log file if you see any activity there. I just tested it here on a server and I receive an email as client and an email as admin. The Resync function is only used when you manually changed values in the database to force the system to write the values back to config files, so normally you never run that.