Molding mishaps! How do I fix this?

I kiinda messed up on the molding and idk what to do.. do I wrap the tall molding around? Taper at the edges of the stairwell and use different molding? Tall molding around the whole landing will look awful. Upper stairs and molding are glued in already (I'm sorry) Top of the stairs i will get the same but fresh short molding with a flat side and kind of notch out the top of the stairwell molding to match (If that makes sense and will even look good?) Also recommendations for entryway tile or some other flooring would be nice. I'm lost and stuck and have terrible design skills Please help, I have been frozen on this project for months