There could be situations in which your courses would only be enrolled after your payment for tuition fees or late payment deposit is recognized by the University:
(i) In Autumn Terms; or
(ii) If you have been de-registered and dropped from courses, and you are subsequently approved for late registration and settled the tuition fees balance.
The process is not instantaneous. Payment would normally takes a few days to be recognized by the University. And while course enrolment would be arranged as soon as possible afterwards, there could be additional factors requiring more processing time, such as study plan assignment, or availability of seats. You should only attend the designated class sections after being enrolled.