I opened a ticket on this issue today (UOO-180016), in order to provide some additional account-specific information, such as call reference ID's.

I also noticed that all of my international calls done during the testing are reflecting a cost of $0 in the usage tab, so I suppose that might mean someone is working on it.

I've suspended further international testing until I see an update suggesting it would be beneficial to continue. If anyone sees tracking of int'l calling working as it should, please update. Thanks!