Generally, only one offer (if any) during each TISC round of offers. If you receive an offer in each of the TISC offer rounds, the later offer round supersedes the earlier one. You cannot have both.
During the pre-December offer period for non-Year 12 applicants (August-early December), you may be made multiple offers, depending on your preference changes. Before the scheduled Main round of offers, if you have not accepted/deferred an offer from the pre-December offer period, you will need to decide which of the early offers you want to keep and have this as your first preference when changes of preference close
Please see the TISC website for details.