So after reading all of the comments you PRO SOAPERS gave me, I had a memory twang. I think I am s-l-o-w-l-y remembering what happened to my brittle batch.
Oh yes, for you all under 38 who don't have children or get migraines, you wouldn't understand how it feels to have your brain eaten.
So, this is my memory: I made two batches at the same time, so I was consistent in making exact measurements and doing it twice. This, right there is a bad idea for me because I can't multi task 20 things at once. Oh, I could make two batches at the same time, but I was also answering the phone, tending to my crock pot of Mama Bomb...and thinking about who-knows-what! So... the first batch I made was lavender. It came out beautifully with lavender essential oil (not my favorite) and did a swirl with rose clay and topped it with lavender petals and cranberry seeds. Nothing went wrong, at all with this batch. It's on my curing rack looking good and swirly, so there's that.
The second batch..... well, the oil looked great so I started to pour the lye water into it, started mixing with the stick blender, but realized that the hard oils had begun to solidify and were settling at the bottom of the bowl. What could I do at that point? I just mixed and mixed and mixed until it traced and then I pulled some out, as I had planned, added black oxide to make more swirls, poured it back to swirl with and BLAM, I got crap. So there you have it. Is it possible that it wasn't over using the lye, but mixing the lye water with the mucky muck I mixed it with? The reason I let it sit and cool off for so long was because I was working on designing and setting up my lavender batch.
I used a great fragrance oil that I've used before in my bath bombs. My shop customers LOVED the scent: black mission fig from Southern Soapers. I may have over scented the soap batch in addition to mixing lye water with muck, but now, the soap smells .... weird. I still love her scent and will continue using it in my b+b products. If anyone has made a successful batch with this fragrance, I'd love to know about it because I do not want the fragrance to be put in the same crowd as the other suspects in this investigation.
There you have it. My memory hiccup, and more information.
Any more words of wisdom?