I've got a swaddlebees velour/hemp onesize and Im having real trouble with it! It always leaks at the legs, however its bone dry at the back! Its been prewashed about 4 times, and my little one has worn it about 3 times. Ive got it on the medium setting as shes only wee for 9 months, but this means I cant use the second booster as there is nowhere to popper it in, and it would be too big. So there is one booster in...but I dont understand why its leaking, yet dry at the back! Anyone else had this problem?