Get rid of the stacked sequence structure and use a state machine. This would make the code much easier to read, and would also result in making any changes much easier to do. You need an event structure to capture Value Change events for your enum. When the user selects a different enum value, the Value Change event could put the next state on the queue or shift register, depends on which type of state machine you use. The states can be built to handle any code that is in the stacked sequence. To add another enum selection, like you are trying to do, you would simply edit the enum to add another item, add cases to handle the new code, and edit the event case to point to the first new case added for this function.
When coding the state machine, you may be able to combine frames from your stacked sequence into one state. See the attached example. Fill it in with your own code. Hopefully you will get the idea. This will make it so much easier to add more selections in the future.
