If he's spitting up after eating, try reducing the number of ounces in his bottles to see if that stops the issue. If not, keep an eye on it and call your pedi if you get concerned. Is he in pain/discomfort while spitting up?
a couple times he got upset if he spit up an swallowed it again...must not taste very good. He doesn't do it right after eating, can be a couple hours later. He hs his 2 month appt. on Wednesday so I will ask about it, just curious if anyone else had experience...poor little guy.