That's awesome. If you hadn't noticed, you're responding to Wizard Labs in your post there.
I'm curious about whether you used any flavoring with that base, and if so, was it a new one? I'm sensitive to PG, but what you described sounds more similar to how alcohol-based flavorings treat me if I use more than 1% or so. I don't think that there are many flavorings with alcohol in their flavoring line, but in any case, you may want to look at the flavoring as well, if it's an unknown variable.
I hope that you get it figured out. It took me awhile to figure out what worked for me, and there are plenty of others here who have specific needs in
juice makeup. Be sure to post here if you need any help figuring things out.