Okay, here's what's happening now. The one she was wearing that leaked, I went ahead and lanolized(although,according to the floating on top of the water test, it didn't need it). I put the other soaker on her, but this time I upped the absorbancy of her diaper underneath. This time, the outside of the diaper was wet, but the soaker was not!!!

So, I guess it was the diaper.
Now another question. My friend(she's a beginner knitter) knitted these using a free pattern online. But the leg holes are not very stretchy and the stitches look stretched right at the thigh. I don't think this is normal, but since I have no clue how to knit, I sure don't know how to tell her to fix it. Do all soakers do this? I thought they'd be stretchier around the legs.