Vomiting from over eating

Anyone got experience of vomiting after their final bottle due to over eating? Oliver (9 months) has a couple of nights drunk his bottle before bed only to vomit it all back up again. He immediately drinks another fill so I know nothing is seriously wrong. Its as if he has trapped air so when he burps it all comes flooding out again, but woudl have thought he too old for that and hasn't happened before. only thing i can think is he is stuffing himself full at dinner time..eating too fast maybe...doing too much after dinner?? wondered how to space out his milk and dinner at the moment he has lunch (solids and bottle) then a snack around 3-4, then dinner (5:45ish) then bit to drink before bath and then final bottle around 7ish which is normally about 180mls. should i split his bottle to before dinner and after dinner? Also, last night after dinner i put him in his exersaucer before his bath to keep him occupied so maybe he got too excited and jumped about too much? any thoughts gratefully recieved as when he vomits i then think 'oh no if he wakes up shoudl i feed him which i desperately don't want to). Thanks,