GO SMS PRO - Group messages not working

[killerz298]

I recently picked up an EVO 3d (stock rom) and installed the latest version of GO SMS PRO. I am running it in normal mode and have the support MMS group chat setting enabled and I do NOT have the Send as split conversations option checked. When I send a group message both of my recipients receive it but when they reply it appears under their individual name and not the group text. We are all on Sprint. They have iphone 4S. What am I doing wrong?

On a different note, it seems the application remembers the last place I left off and reopens to that spot instead of the inbox. Any way to get it to revert to the inbox when reopened?