I drink a lot of JP. I've never been to the brewery, but i have always been pretty impressed with what they are doing. i don't think the OP's description of what he tasted fits with anything that they would want to put out. when a complex array of micro- organisms are used to produce a beer, the margins of what can potentially happen certainly open up a bit, but that's why they blend. "infections" can still happen, even when your beer is "infected"
"i like to drink. I do it all the time, every day."- anthony jeselnik