Not for nothing, but normally, the Camera Raw Worlflow Options should be sticky...meaning, whatever option you set should be picked up the next time you launch ACR. If this doesn't happen, it would be useful to know what OS you are working with (just Mac doesnt tell us much).
You need to help us help you resolve the issue...
Thanks, Jeff. Now they do stick - dunno why not before. FYI, 10.6.8.
Maybe you ended with Cancel instead of Done/Open?
Could be. Anyway, the settings do 'stick' now.