MummyTummy- sounds like the sewn in rather then the snap in dlish may be more suitable for your bubs... you can remove the 3 layer bamboo trifold and just change more often,.. or you could make a smaller bamboo insert youself if you know how.

as for wing droop, its when the under snap/velcro layer sag down from the wings.. does that make any sense , so its being held up but you have two wing type shapes sagging down either side