Multiple mock responses

Hi. I have a scenario where I need to call my web service and then it calls 2 external web services before returning a response. And I want to mock those 2 external web service calls within my test case. Does anyone know if this is possible? What I'm seeing at the moment is even though I have the 2 mock responses configured as test steps and the log is reporting them both as started the first one tries to handle both calls.