I know this, but I don't remember it! 
I haven't used maintenance plans for a long time.

There's a glitch in the GUI of SSMS, and I THINK, if you rename the jobs, or remove a step, or something like that, the steps of the maintenance plan essentially disappear.

Here's what I suggest. Create the maintenance plan and do not change anything.  Then re-open it and make whatever changes you need.  I do remember that