Dear @Wadani1,
Without seeing the results themselves, I’m actually not sure. My guess would be that the ELISA is just for knowing if you are positive or not for HBsAg (there may be a threshold signal over which you would be considered positive).
The quantitative HBsAg is designed so that it can tell you the specific amount of HBsAg (in this case, it is very high - more than the highest level the ELISA is set up to measure).
HBsAg and HBV DNA does not necessarily go down together, because the HBsAg can come from virus-producing cells (which make both HBV DNA and HBsAg) or from cells with integrated virus (which only make HBsAg).
The most important thing is what we discussed earlier: your prognosis is good with your current values, but you should maintain monitoring to watch for any changes.
Hope this clarifies some things.
Cheers,
Thomas