It doesn't seem like the "Billing Information" header gets shown anymore (DTR 2.7.2e) which makes the group reg confusing when after entering the member info, you get to the page where you are supposed to write the Billing info, and it just looks like asking for your contact info again. (yes I understand the difference between fields for members and fields for billing page, however, without a header to distinguish, or custom text that displays ONLY on the billing page, it's difficult for the end user to know why they're being asked for basic info a second time, if we're already harvesting that info for each member of the group).
I don't see any setting to display that header either.
I actually was asked this by my clients as they said the same thing ( Confusing )
So to fix it for my sign on I turned off multiple registration , But all my events were pay later . So it didn't matter .