As you can see, it shows the raid frame (upper left) and the group frame which is below it. But the raid frame contains all groups, even the one you're in yourself, which I think is overkill and unnecessary.
Off course I contacted Lyn about this himself, but he can only give me the "Hide Party Interface in Raid" solution which is in Options > Party & Raid, but I don't want that. I want to keep the bigger party frame, I just want to remove the group that I'm in from the raid frame.
So in a 40 man raid, only 7 raid groups would be showing in the top frame + the slightly bigger group frame below it, making 40 people.