Well, My seeds hadn't done a damned thing. So I turned the cubes upside down and tapped out the seeds. Not a single root had bothered to go any further.
Of course, I set them in a glass of water overnight, the roots start to pop out just fine. I think my pH testing solution is out of whack/too old, or there's something else going on.
First time I've ever had a problem getting seeds to sprout. Funnily enough, my last couple tries to clone from a prior-existing mother in this same place failed miserably as well, and I did nothing different than any other time.