If I set Include Group Billing Records to yes, I see this, which is better, but not ideal:
I expect to see Alex Greene's name in the above list, which is the other entry made by Ron Greene. Also, I don't know why Ben Duong shows twice in the list.
Here is what I see in the back end:
I have "Include Group Billing Records in registrants management" set to no, but you can see that the individual registrants are shown correctly.
Also, it looks like when group billing is enabled, all sales are then shown as group sales, even when there is only one registrant. This would be better if it only showed the Group for sales that were actually group sales.