When loaded with lovely_santa's More Science mod, this creates an extra recipe for Chemical Science packs with the same ingredients, made in the same buildings, but takes half the time.

Noted. I think I know why that's happening. I have added it to the fixes I need to do. I have a plan to fix all of the things people have told me, really! Life just keeps getting in the way, and then my main R720 which runs my factorio dev platform went down a few weeks ago due to a failed raid cache battery. Few more weeks hopefully and I will have the fixes out.