So I was going through people's profiles, giving them some of my Agents as I'm not planning to do any Sylesti Brewing this festival. But when I was putting some of them on one of Krin's Cauldrons, it gave me the coins and then instantly needed another Agent. Tried it a second and third time, figuring I'd done something wrong and trying to figure out what, and both times it again went right to needing an Agent automatically.

Dunno what that was about or whether I should have just stopped at one and moved on.

I used an Expedient Brewing Agent on it. =P

I could add a display for that I suppose.

It's not a big deal. I was just worried I glitched the system since I didn't know exactly how the expediate agents worked (I figured you put them on to instantly make it need another agent, not that it worked continuously).

Yep. If a Brew had an Expedient Brew Agent used on it, using a Brewing Agent to cure a condition will automatically add another condition w/o it having to wait the 30+ minutes.