AU Payroll - Submit Casual Rate timesheets during the week and also the weekend
As you’ve found, right now it’s not possible to submit timesheets using the casual rate during the weekday and then also to be able to submit timesheets for the casual rate that applies on the weekend.

From your idea it sounds as if you'd like employees to be able to submit timesheets with start & end times and different earnings rates, Nathan? This isn't possible atm.
However, an option here where you're dealing with multiple earnings rates for an employee is to get them to submit timesheets using the 'Total hours worked'. This'll let them;
- record the number of hours worked per day, including partial hours
- record time spent at different earnings rates and tracking categories if used.
Your employees may need to edit the timesheet setting, by opening Xero Me, going to Timesheets > Settings and selecting 'Total hours worked'.