How to delete a single registered in a group

hi,
1. when a user make a group registration. Can it possible to remove only the history of one of the inscriptions? and if so how? I tried to do, but if I select one of the registered and that I cancel the registration, EB removes all registered of the group.
2. in the history of entries, for example with 3 registered in a group, EB display 4 lines: 1 line with the group and three lines for each registered, why?
For question 2, I found the answer in the settings must be checked "no" to "Include Group Billing Records in registrants managemenet"
Tuan thank you in advance for the answers.

Hi

At the moment, we don't have a way to allow cancelling/deleting a member in group registration, so it is not possible to do that

Something we need to find out in the future

Tuan