I wouls like ot know too. I'm wondering if I have to wait for 2 weeks to pass before the option appears? I'll start searching at that time to see if a new option appears. If all ease fails I'll look for the manual.
I had this problem also. The only way I could figure out was that sometimes the little wii board askes you if you want to change your goal. Or you have to wait until you time is up, or you make your goal.