The only thing I would be concerned about is 2 day CM's comments which kind of shows she not that up on recent (as in the last 10 years or so!) development. For a start milk feeds should be approx an hour before complementary solids, not given at the same time (how on Earth did she fit 200mls and food into his tummy at the same time??). No wonder he was settled afterwards - he was probably sleeping all the food/milk off!
Could you give her some pointers for feeding your DS?
Perhaps something like:-
Milk feeds are to be less than Xml and given an hour before his food,
Plenty of pauses during the milk feed to allow him to feel full,
Holding him while feeding him his bottle/cup,
Offer him water in a cup/beaker with meals,
If he seems distressed comforting him first rather than offering food as a first resort.....
I'm sure you have plenty of other ideas!
PS. BLWing babies don't need to have teeth just gums that can smush food - try things like banana (cut a banana in half then stick your thumb in the cut end at the middle [by the black seeds] this should split the banana into 3 fuzzy covered sections which aren't slippery), skinless potato wedges, par-boiled carrot sticks, chunks of cheese, breadsticks to suck on (dip in soft cheese/yoghurt/fruit puree), or just give him something like homemade cottage pie and let him stick his hand in!
As he is over 6m he can have pretty much everything (Except nuts/seeds, skin on apple/potato, whole round foods like cherries/grapes/cherry toms (fine in pieces!), high in mercury fish in excess, raw eggs, shellfish and honey) and a balance of fats, protein sources like cheese/meat/fish/meat substitutes and fruit/veg is fine.