Hmmm, it could be a couple of things:
1st, are they new or pre-loved? They could have build-up (of detergent) which could stop them being absorbant. You could test this by getting a clean dry one & dropping some water onto it, if it beads on the surface rather than sinking in then they may need striping.
2nd, they may not be absorbant enough for your LO. Fluffles as far as I recall are all microfibre which is the least absorbant of the nappy fabrics, are the nappies soaked when you take them off? If they are then your LO is outpeeing them & you either need to get rid of them & replace with cotton or bamboo versions or add some additional absorbancy (a booster under the fold-out tongue bit.
3rd, it could be a bad fit of the wrap. I've not used the newer tots bots wraps but we never got on with the old one. I find Thirsties Duo wraps to be the most reliable & leak resistant.