Default [Q] How to alphabetically sort contacts in group?

If you add contacts into a group (says Favorite), those newly added contacts will be put at the end of the group, regardless of the contact name. How can we have it alphabetically sort the contact?
I know that Sense 4 allows to custom sort the contact in group, but why don't they alphabetically sorted by default (like any other phones)? It's kinda annoying if you add new contact to group and have to see where it should go.