There is a new function on the side bar called Steps. Every step you have created in any of your checksheets can be found here.
This function allows you to re-use steps from existing checksheets into new checksheets.
Also, if you accidentally delete a step or section of steps from your checksheet, they will be saved in "steps" and you can upload them again. Here's how:
Open your course checksheet at the section you want to upload the step.
Click Add a New Step.
Choose from the categories Learn, Apply, Review and Control. The "existing step" will be at the top of each category for you to find the one you want.
Then click create step.