Is my baby having too much milk?

My son is 2 months and 3 weeks and takes about 5 bottles of 5oz of formula per day. He seems to want to carry on feeding even when he has finished his bottle. Should I carry on with 5oz per feed or increase it to 6oz?

Note: he was a big baby at birth, weighing 9lbs 13oz and is now around 13-14lbs - he was in the 91st percentile but he is now in the 75th

Update: spoke to the health visitor and she said he is doing just fine eating, I haven’t stretched his stomach or overfed him, I’m just responsively feeding and it’s fine for me to up his intake to 6oz per feed if that’s what he wants