Why? How? Ugh.

I sincerely hope that your doctors find a solution to your reflux. With my first band the reflux was so bad that it actually burned the soft tissues at the back of my throat. 

A lot of times slips go undetected with x-rays. Make sure you get a report of the endoscopy procedure from the hospital and not from your band surgeon. I say this because the report I got from my band surgeon left out one very minor detail. That detail was that my band had eroded. I even asked my band surgeons P.A. if I had had an erosion and she looked me in the eye and said, "No".

I knew that I had an erosion because my mom told me that the doctor who did my endo had come into my hospital room after my procedure and spoke with her about it. ( I was still out of it due to the IV dilaudid ) Anyways I called the hospital where my endo was done and had them send me the appropriate medical releases to sign, which I then sent back and a couple of weeks later I was able to read the part my surgeon had conveniently left out. My band had eroded.

I know some people have had similar problems when they had a hiatal hernia (sp?).  The endoscopy should help you diagnose it all.  I am so sorry that you can't get rid of your heartburn and reflux.  Any chance you can get some Rx strength stuff until you get relief?  Hugs to you!!