Also, it is generally not recommended to use Manual Groups at all. It is much better to have an automatic group with relevance to look for the specific computer names, IP addresses, MAC addresses, Serial Numbers, or some other criteria you want to define for which computers should be contained within the group.
Manual Groups cause a lot more overhead than automatic ones, which can be a problem for large environments.
In automatic group also show all action which taken on machine. we want once you check action history in group it should show only those action which taken only group not on machine.