dont apologise for asking questions - it helps to get us all thinking
i think i may have read that bamboo and hemp absorb fluid more slowly than cotton or microfibre. so it may be an idea to try a different combination of inserts.
i've not tried bamboo, but i do like to microfibre(for speed of absorbancy) with hemp (for quantinty of absorbancy/slimness) together.
Are the nappies a snug fit on legs/tummy?
is clothing tight? eg vests can cause leaks if they're on the snug side
is nappy leaking where waist band on pants causes pressure?
Hope you get things sorted, and all goes well with pg.