Glad to hear, that it looks like you found the problem!
I think you have done better than I have, as far as germ rates and such. I've grown some good weed, but I have also had my fair share of disasters, Lol!
Had to toss a grow last fall, due to multiple reasons, tried washing off my plants once while they were flowering,(yep, threw out about half a pound of rotten bud!), dropped a light on my Critical, twice, putting her into critical condition, burned those seedlings this spring.... I talk to my plants a LOT, often though, it is to apologies!!