Gallbladder post 1year bravo test negative for acid reflux, but upper gi showed esphogitis reflux and some erosion, what is causing if no acid reflux?

Non-acid reflux. Could be non-acid reflux. Also, no test is perfect, and the bravo study could be incorrect. Its also important to use the bravo data to correlate symptoms to acid reflux episodes. There is also a 24 hour pH-impedance study that can detect reflux that is not acid. Ask your GI doctor about these. Hope this helps!