On point 2: If my test name is "CreditCardPayment", my datatable local sheet name shows up as "CreditCardPayment [CreditCardPayment]". Therefore, my master spreadsheet sheet names are also named thus.
UPDATE: I must add that as these are resusable actions, they are all referenced in my master test as external actions. So that's how the local sheetnames appear is my master test datatable
UPDATE: I must add that as these are resusable actions, they are all referenced in my master test as external actions. So that's how the local sheetnames appear is my master test datatable