Quesitons raised by todays Neighbours episode

1. How does Karl Kennedy have enough time to work not only as a GP but also in practically every area of the hospital, not to mention do counselling, as well as be in a childrens party act performing for four 4 year old children at no 30?
2. Why were the 4 year old children havign a party at no 30 anyway?
3. How do Cameron and Robert look EXACTLY the same - with even the same hair-cut even though Cam's been in a coma for 7 months?
4. Why is Cam not wearing a hospital bracelet nor does he have any scars in his arms from the IV which would back up his story. Also - he has JUST woken up from a coma - how is he so well?
5. (and most imprtantly) WHY DOES KARL NOT REALISE SUSAN IS MADLY IN LOVE WITH HIM AND WHEN WILL THEY GET BACK TOGETHER??!
that is all