The fiesta production system is very poorly named..
The recipe names rarely matches up with the actual thing you're making..
Referring to the Wiki:
http://www.fiestafan.com/wiki/index....ion_Production
The recipe name for T2 antidote is actually "Antidote Potion (Tier3+)" Which is bought with Fame (at Nina I believe)
The T2 recipe you've got is probably the one in Step 1, which actually only makes T1 Potion.