When certain exam groups and class times conflict, you need to prioritize these classes and make new lists. In the above instance, if you get Soc 3, but you don't get Ethnic Studies 21, you'll have to go for your second backup, English 15, so you won't have an exam group conflict. If you can't add a course because it's full, get on the waiting list right away. Remember, the units for waiting list classes are included as part of your overall unit total. See the Schedule of Classes for specific dates.
Departments use their own set of criteria to determine which students get enrolled.
It means that they can pick and choose from the list as they please, without regard to the order of the list. If you're still on the waiting list by the time classes begin, it's a good idea to go to the first class meeting to demonstrate your intent to enroll in the course. You'll also be able to get a more realistic idea about your chances of getting in. Academic expectations at Berkeley are going to be different than what they were at your high school or community college. You can always buckle down next semester, after you've made some new friends, found your way around campus, and learned how to do your own laundry.