I personally think these two got left out simply because she decided to lay her eggs in a hide that was not tall enough for her to coil all the eggs easily. This was her first time breeding. I think she laid them, attempted to coil them and there was simply not enough room in the hide for her to coil completely around all 6 eggs, and two rolled out.
I took it as another "first time breeding lesson learned"...take out the smaller hide when egg laying is near!