Well that's as good an explanation as any. It's a distinct possibility because I often have a minute or two when I'm getting situated before pouring that next layer.
The funny thing is, the first couple of times I poured layers they worked fine. One difference that I did think of - The first two times when the layers worked okay, I was using 1/3 coconut oil, 1/3 olive oil, and 1/3 palm oil. I've had two other soap batches separate since then and both times, I was using a recipe with a high percentage of lard. So I'm thinking lard recipes might not work well for layering (?)
Could my soap temperature at pouring have had anything to do with my layers separating?
I also just remembered that I was using 6% or 7% superfatting with those failed recipes. Could that extra oil be the problem???
I run my numbers through a fragrance calculator and use the strong end of the measurements for adding fragrance. Could a lot of fragrance affect the way the layers bond?
I hope I can get this mystery solved because I like doing the layers