You should take two weeks to really set up your my time successfully. For example go to each of your team members ask them for their true availability, their desired availability, their desired number of hours, and their preferred time off. Spend the next week in putting all data into my time. Build a set schedule based on all this information along with peak hours in your store. Then each week you're only trimming to the store's hours (Payroll) And time-off requests.
Work hard now to work less later