Decided to dupe the issue from tfc discord for easy access.

Boiling clarified sugarcane juice in a pot (though may also be a problem for regular/filtered juice and a firmalife vat) yields more than 20 mB of molasses per 200 mB of juice. I presume it uses the previously obtained value of fluid in its calculations and not the current one?

Issue seems to be that the recipe's result FluidStack is having its fluid amount multiplied every time. Need to modify the function to make a new FluidStack every time and multiply that one's fluid amount