Problems altering Staff Size

[Ben Lewis]

I'm typesetting a concerto, and I want to use the feta14 size for the full 
score. The first time I tried, I placed the #(global-set-staff-size 14), but 
it changed the appearance of all the parts, too. So, I added the \layout { 
#(layout-set-staff-size 14) } segment to my \score {  } block, and it 
promptly made my score look like the attached segment. Any advice?
~Ben
P.S. In the image, this is about half of an 8.5*11 page.
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