I drilled about 30 times more holes in those molds, cut a few in half, and they worked perfectly today. My second batch is going strong at the moment, all problems of the first Camemberts are now corrected.
Assuming the second batch grows mold well, I'll be swimming in Camembert in 7 weeks, or 9 weeks, or later if I want runny Cam.
The knitting grids I use now, which are super cheap and can be purchased at Michael's for $.69 for a square foot or more, are far better than the bamboo matting.