Users and groups are sometimes listed in the same dropdown list. This used to be confusing because it can sometimes be hard to tell the difference between the two. Even worse, on some screens the button said “add user” even though groups were there too.
In version 2.8 there are now user and group icons next to the names. The text on the buttons has also been updated to reflect the dropdown content.
This is just one of many changes we've made in version 2.8. If you'd like to be a beta tester, be sure to let us know!