Some of my plants consistently turn out leaves with fingers that are almost twisted upside down, or curve to the left or right, or will often have disproportionately sized fingers (i.e. the finger to the left or right of the middle will actually be the longest). Some of the leaves will even have even numbers of leaves (like 4 or 6).
Why are my plants mutated!? Are they starving for boron or what??!! I assume it is a trace element they seek. I don't think the two are related, but keep in mind nonetheless that they were flushed like 5 or 6 days ago after showing signs of nute burn.