Couldn't read and not post.
I am no expert on reflux babies but I have asked others with experience to come and have a look.
If LO is upset, then I would just back off, and leave it for now. There's no point in creating distressing memories of meal times. A week, or two, is a long long time for a baby, so if you have to hold off for a bit, you can try again soon. It *does* sound like a lot of food for any 6 mo, especially one with reflux. I know the general rule of thumb is 'food is fun until one' and that nutrition is supposed to derive from milk (breast or formula) until they are 12 mos.
But, as I say, I've asked some more experienced folks to come and offer their advice.