) I am deducing that you used a combination of those methods to try and break-in the leather and somehow ended up applying a witch's brew. I cite your earlier post about 3 applications of Proofide (a conditioner/softener if over-used), 2 applications of SnoSeal, pushing on the leather in the middle (which stretches it), and, getting the saddle wet with "alot of water." All in one month.
You forgot about the mallet, which I think is the culprit.
Two weeks after getting my B72 I had a 150 mile ride. It rained for the first 3 hours. My saddle was soaked completely through. It had a coat of proofhide on it, but that was it. I have another 500 miles on that saddle and it is just fine. A little water or even a lot of water will not do that to a brooks. But snoseal, proofhide, a mallet and some water obviously will.