Each shift in our system can only be assigned to one helper. If you need more than one helper for any date, time, and job you will need to add multiple shifts and assign the helpers, one to each shift.
Normally each week you would Import your set of shifts and use AutoFill to assign them automatically but you can use the Add Shifts button on any weekly schedule view, enter the shift information, and then choose multiple helpers in the grid below and when you click save this will create as many shifts as you chose helpers at that time.
To select multiple helpers in the Add Shift window, you can hold down the CTRL key and click each name.