If you don’t set the actual Smart Scan (the reason I post images) to manual then it would also run monthly along with the manual scan you set up.

I admit to being completely lost as I can’t see what you can see, the very reason I use screenshots for clarity.
So I can’t see the Two scans that you refer to.

Regardless of that you need to choose one and remove the other, so you don’t have multiple scans. The choice is yours.