Thanks for the feedback.
I did read the older information in this thread about contaminated yeast samples. I definitely hope I don't have that problem. I brewed what is on track to be my best dubbel a few months ago, and I want another awesome one to add to the stash.
Your experience is very interesting. I brewed what I wanted to be a 100% Brett Saison with ECY (I forget the type) at the beginning of last year. The beer ended up having trouble with fermentation and getting ropy after a few months, which I believe is the result of pedio. I always thought I screwed up the starter, somehow. I definitely may have, but perhaps there was unintended bacteria in the sample as well. Unfortunately, I don't have the lab equipment or skills to check.