Hi, I don't know if this is an issue or not, but I was playing on Create Version 0.2.2a, forge version 28.2.3, and was doing the alloying with the whisk. I noticed the whisk only did one operation even though I threw in a stack of copper and zinc and one blaze rod. I then threw in another blaze rod and it did another operation. I realized it did one operation per catalyst. This seems like a bug, since there was no mention of having to take out the catalyst before another operation and seems to only affect recipes that have a catalyst.

I think that it's intended for the mixer to do only one operation. While it seems annoying, it's easy to add an extactor to the basin and filter it to only blaze rods. If you want, you can even make a conveyer belt that transports the catalyst to a filter on another side of the basin.