I clicked the Off button.
... you have to click on the radio button beside them to make the change. Your description strongly suggests to me that you cklicked on the text "Off".
Huh? I do know how radio buttons work and did state that I clicked the button.
The autoplay option buttons are a bit bugged, I find I have to click a bit to the right to get them to change.
This probably explains it, thanks. I clicked on the button, not to the right. Will try in the future (although I haven't had any problem with some other cards like Hero). Remember the Tournament 3p crash bug I found where I couldn't change the default option? Maybe the same thing - a UI issue.
As for the Changeling Smart Ask logic, thanks for the explanation. I was obviously taking advantage of the dumb bots that I knew wouldn't make the exchange so I would get a Changeling (still experimenting with this card) and they wouldn't. If I had been able to change the Autoplay option I wouldn't have thought there was a bug.
EDIT: Next game with Changeling I didn't try to buy it, just played with the Autoplay Options and Mic Qsenoch was right on - definitely a UI issue. While the other radio buttons worked normally (clicking anywhere within the button selected that option easily), it took a bunch of tries to get OFF to work with an apparently inconsistent and/or tiny "strike zone".