I assume no solids are given at have wheat, milk, soy, nut or egg in it? (Just checking)
I think because he feeds at 2-4 he not hungry at 6.30
I would maybe try giving nothing till 7-7.30 and make this the milk, then try solids after that. That said, it's not a lot of solids anyway which may be why you get the good feed at 11.30
I guess you have a similar problem to us really. Neocate tastes like rubbish. Solids taste good and they keep it down better. So baby likes solids (go figure right) problem is solids can upset tummy, cause constipation and sometiems make the reflux worse so baby feeds at night to get what they need.
how are his poops?
IIWM I guess I would first see if an increase of meds is possible and then trial that to see if it helps. You should see a change in a week. Then I would try to juggle solids/milk so that you feed when LO is defiantly hungry. I cheat sometimes when at is be fussy and add a bit of prune juice to the bottle to sweeten the milk so he will take it.
Have you tried a variable teat? - sometimes these help if LO is frustrated with flow?
Sorry a ramble really...I am thinking out load