Limitations

Nested IF blocks are not allowed
Task level IF, ELSE IF or ELSE blocks can be moved up or down within the task whereas test case level IF, ELSE IF or ELSE blocks cannot be moved up or down.
$$_Status can be used only for step's execution status. There is no provision to store or refer Task's execution status.
A test case level step cannot be moved to task, or multiple test case level steps cannot be moved to new or existing tasks.