If you have a customer with multiple memberships, you can designate one of their memberships to be the default to use when checking them in.
Choose one of the following:
Go to Administration > Population Settings > Customers.
Go to Front Desk. In the side-bar, click Population and select Customers.
Search for and select the customer to view.
Click Set Default Membership for Check-in.
In the Set as Default column, select the option button that corresponds to the membership package to be the customer's default for checking in.
Click Save.
Viewing all currently checked-in members