When RPG is invalid, process groups show incorrect count for 'invalid'

When a Remote Process Group is created and is invalid (due to invalid hostname, for example), the parent Process Group should have an 'invalid' count of 1. Which it does. Its parent should also show an invalid count of 1, but it shows 2. And its parent shows 3 instead of 1, and so on. So if the RPG exists 6 levels deep, it will show an invalid count of 7 instead of 1.