I am reading a lot of people with port flippage. What causes this so I can avoid it!!??

I think it just happens (flip, slip) and there isn't much you can do about it. Mine slipped and I didn't do anything "wrong"...it's in there with fat and organs and muscle and so moves around a bit! and as you lose, things move around even more.

If you're worried about it, check with your surgeon. He's sure to have some tips, if there are any!

What happens if it does slip? What do they do? Is it surgery again? Do you have to start over?

It depends! Mine slipped and it is no big deal. Obviously, if it turns so that it is inaccessible, then the surgeon will have to correct it. That's why you need to ask your surgeon about it, so he can tell you all the scenarios!