The problem I experienced was that I was interested in a particular activity. I figured it would be a popular activity so I wanted to register as soon as the registration opened. When I tried to do that, I noticed the registration window was greyed out and I saw a message that I had a conflicting activity scheduled. I quickly went back to my list of activities and cancelled the one in conflict which had a waitlist of about 5 but I was a confirmed participant (of the two, my preference would have been for the new activity). In the short time it took to cancel the other activity, the new activity had already filled up so I could not register (could only get on waitlist). But now I had cancelled the other trip and lost my spot there. So now I have no activities for that day! Very frustrating. My idea is to allow a short window of say, one hour, that a person can have conflicting activities and they have to choose between them within that hour or the decision will be made for them. Not sure how this could be programmed in to be automated but it sure is frustrating to lose a spot. We should be able to choose between activities without risking losing out on both.