We often have two or more separate events occurring at the same time, or within a few hours of each other. In the check in manager (which is wonderfully simple and perfect for use on smartphones) it would be very useful to be able to switch between different occurrences of the same event that day, or different events also occurring on that same day. The guest lists don't need to be combined (although that could also be helpful), but rather a simple way to switch to a different form or time for any events occurring on that date.