i think everyone's comments here are valid. I can only share with you "our" experiences with our two. Which was a while ago, (currently 10 and 12).
Our two were bottle feed from the start. Sorry but i'm a risk person and after seeking so much advice and information there was nothing that could push us to not! (and ten years later get told they are both well behaved etc, and pretty smart)..
Both our children had what they called silent reflux. This is a huge issue (over normal reflux) as normally the bub will chuck! (and you can tell) but with silent reflux as soon as you put them down (couple of minutes) and they just have it come up a little and burn the throat.
As per some suggestions we used to put a pillow under one end of the cot. (creates an angle) this helped but didn't solve the problem. Mrs Firefox even took the first one to sleep school (the entire controlled crying etc, which i believe does work, but not with silent reflux)..
Anyhow i've given this TIP to many people and they have tried it and it does work (especially if the bub has reflux).. We spent $$$$$$ money seeing a specialist, he took one look and said as soon as the feeding is finished (and i mean immediately) give the bub 2ml of Mylanta (yes the green bottle stuff) it does exactly what it does for adults. You can only give a small amount but thats all the need. (we used to have syringe with 2ml in it) as they got older increased to 5ml (when my son was drinking about 200ml in a feed). OMG! what a difference after 2 sleep cycles the kids were sleeping through the night! What a difference it made to our life.
Anyhow i don't know if thats the problems with your's, but it certainly doesn't hurt to try. Stick with it, alot of doctors (and nurses and other people) will tell you to "just deal with it" or thats a baby. It's not really true. I am sure if you sit down and think and try different things something you will find will work specifically for your case. Take all the advise onboard and try different things.
Hopefully someone will give some advice that works..
BTW, after 10 years it goes the other way! I can't get my daughter out of bed before 9AM! Drives me nuts.