1.    Create a correlation type with the property "BTS.ReceivePortName;" this will ensure a single instance of an orchestration, since all the messages come from a single receive location.

2.    Create a correlation set with the correlation type created in the previous step.

3.    In the first Receive Shape (Activate = true), set the property "Initializing Correlation Sets" as the correlation set (created in the previous step) and in the Second receive shape (Activate = false), set the property "Following Correlation Sets" as the correlation type (created in the previous step).

NOTE: Any promoted property which would be the same across all the messages can also be used as the correlation type property.