I looked over your report, and although I'm no expert, what I came up with was this...your DeMeester scores were very low. Anything under 14.75 or so is considered normal amounts of reflux. Your scores were 4-6 something, which is considered very normal. Your doc wrote something like "DeMeester scores were negative" and this is what he meant--the results were that you have very little reflux according to the results of this test. (That doesn't mean that you don't have very bad reflux at times...they just didn't show up on this 24 hr test. You could have another test at a different time and your results might be more impressive.)
He also wrote that the correlation between actual reflux and your pushing of the button and reporting pain was not very good. This is probably considered another indication that your reflux was not significant.
These tests are looking for evidence to see whether or not your reflux is significant enough to require surgery. This is actually good news.
That said, I had bad asthma created by GERD for several years. I had this test and the results were a DeMeester score of 4. At that time my lungs were very bad. My GI doc sent me on my way saying that my asthma wasn't being caused by reflux.
He said that and the test said that, but my PCP and asthma docs weren't convinced. I continued to suffer for four years. Finally, my DeMeester score was 14. Still in the norm, but with the continued pressure from my PCP the GI doc told me that I could continue to treat my reflux with meds, or I could go to a surgeon to discuss possible surgery. Seriously? The meds weren't working. I went to the surgeon, who also expressed concern over my low DeMeester score, but agreed to do the surgery. Two and a half months after surgery my lungs were about 100% better. For the first time in four years, I was able to reduce my steroid load and no longer needed my nebulizer treatments to breathe.
I don't know what led you to the PH testing, but like all tests, it is a snapshot of a moment in time.