Selecting Top and Bottom notes in a Chord or deleting Duplicate Parts after exploding.

I have transposed a very stacked piano part into musescore and exploded it so I can make it for a large ensemble. My issue is that there wasn't a consistent amount of notes in every chord so my explosion has left me with many duplicate parts. I would be able to fix my issue if I could only select the top or bottom notes of all the chords. Or if I could explode from bottom to top. Anyone have an ideas?