Have another read through all the input H, no need for anyone to try your beer.
Aleman nailed it first reply, backed up by Grays, with lots of other advice on how to prevent it.
I think I said making good beer in not hard you just need to follow some "simple" rules. Get some nice beer made and then worry about perfecting your process before getting to complicated.
Looking forward to hearing the final verdict on brews 2 and 3.