Claire
In the first six months, they're often on amounts greater than those (in terms of total grams per day) than older dogs because of the huge huge amount of growing they're doing. I can't remember when exactly (think it was the 11 to 12 week mark), I'd leave Paddy at the petsitter in the morning and he would have grown by the evening - visible changes. I thought I was imagining it at first but when I said it to the petsitter (a cocker owner too), she said, nope - he's growing by the day! So you feeding your little pup in large quantities may be the right amount.
I remember sitting at the kitchen table with a pad and a calculator and transposing the age/body weight/food amount guidelines onto the pad, with gaps for the intervening ages/body weights and then calculating it all to the precise gram for Paddy's age and bodyweight!
Nowadays (since he was six months old) I feed him raw meat and bones so I'm afraid that I've forgotten the likely amounts you should be feeding a puppy (whether it's wet or dry food). Remember as well that if your pup starts getting podgy, then you need to scale back a bit, notwithstanding the guide amounts.
Denise