I'm not sure how common this is, but I thought I'd share my story in case it happens to someone else.
I had my band surgery on December 22, 2010. I went in for my first fill three weeks after that. The doctor had a difficult time getting the needle to go in the port, which is located just above my belly button. He told me to come back in three more weeks because it could be swelling interfering and not to worry about it too much. In the back of my mind, I thought that it must be flipped. There had been one evening when I was exercising and after a vigorous run, I felt my port "move" (I don't know how else to describe it). Well, over the course of the next three weeks I noticed that the port had begun to stick out; in fact, my esthetician said that it looked like I had two belly buttons - an innie and an outie. The port had also started causing me some discomfort (not really pain, but it was bothersome). At this point, I knew it was flipped. When I went back to the doctor he confirmed this.
I had my port fixed this past Friday. It was an out-patient procedure done in the same hospital where my band was placed. They treated it as any other surgery and knocked me completely out. The procedure itself didn't take long. I arrived at the hospital at 8:00am and was discharged at 11:00am. The doctor actually replaced my port with a smaller one and did a 4cc fill while he was in there. The incision is about 3' long and required seven staples. Since I live 2.5 hours away, he sent me home with my very own staple remover and I was able to remove the staples at home Saturday evening (quite an interesting experience). I'm supposed to call in each Friday with a report and a weigh-in.
As far as pain goes, I would say that it isn't too bad. The incision itself is sore and my stomach feels like I've done a few too many crunches. It's not nearly as painful as the actual band surgery. I did have quite a bit of abdominal gas the first 24 hours - GasX to the rescue!
I'll definitely be wearing my binder when I'm working out, as well as watching more closely what I do until I'm completely healed. I know that I rushed it before and I won't make the same mistake twice.
So, there's my flipped port story. Any questions? Ask away!