How To Setup Competition With Multiple Stages

CREATE MAIN STAGE

Go to Competition >> Add new competition. In Multistage dropdown select Multistage Main.
Type competition name in the page title and round (or stage) name in the Stage title field.

Recommended to set competition logo in the Display Options metabox.

CREATE SECONDARY STAGE

Go to Competition >> Add new competition. In Multistage dropdown select Multistage Secondary.
Type competition name in the page title and round (or stage) name in the Stage title field. 

Set Stage Order and select Main Stage ID (which you have created on the previous step).

CHECK RESULT

Go to the Competition list and check that everything is alright.

TIPS

If you forget to set Multistage Main in Multistage Secondary, you can use Stage Secondary filter to find competition and fix the error.