Because the phial, flask, and potion spillover buff doesnt stack, its optimal to craft all your phials in one go, then all your flasks, then all your potions (in whatever order) because the spillover buff gets canceled and replaced by each type. If we could sort the craft queue into these categories then the Next: Craft button would be usable for more Alchemy.

I suspect this issue will become more aparant in the next few weeks as more people become diverse crafters across multiple types.