Insert the call after the current step rather than at the end of the test
When creating the call to the Action, do the following:
1. Select the step within your Action where you would like to call the second Action.
2. Go to Insert -> Call To Action.
3. Navigate to and select the test that contains the Action that you would like to call.
4. Select the "After the current step" radio button.
5. Click <OK>.
You can also embed a copy of an Action within an Action. Follow the same steps, except go to Insert -> Copy of Action in step 2.