I think this forum will help you a bit:
http://www.macinsiders.com/showthrea...er+timeta ble
The system does try to slot you into times that will not conflict with each other but it may not be the best schedule according to your own preference. For instance, if you can't wake up in the morning, then 8:30am classes every day of the week will not go well for you. Unless there's no other choice (if the course only has that one core or some other reasons), you may want to check out the Master Time table to see if there's a more desirable timetable suited to your preference. When your timetable is released on the 11th (I think) you will have the opportunity to go back into SOLAR to change cores, labs, and tutorial times (if available).