You're creating a member [Amanda P-D] that adds Amanda D and Amanda P., but then you don't use it in your query. Jut looking at this, it looks like your report brings back the submissions for Andrea W, Ann F and Aubrey S.
Am I guessing correctly?
What if you just add to your columns axis:
SELECT ( { [Underwriting Facts].[Underwriter].&[Andrea W],
[Underwriting Facts].[Underwriter].&[Ann F],
[Underwriting Facts].[Underwriter].&[Aubrey S],
[Underwriting Facts].[Underwriter].&[Amanda P-D]
} ) ON COLUMNS,
I'm just guessing here. I hope that sparks a thought on your part.
Good luck,
Rob