Duplicate Alternate Repeat Brackets

[Lyle Raymond]

I recently posted a question involving repeat brackets colliding with chord 
names.  Thanks to Matts Bengtsson for the solution.  However, after 
implementing the solution, I now have a new problem.

On the topmost of three staves, the repeat brackets are duplicated.  The old 
brackets remain, and new ones have appeared where I want them.  How do I 
eliminate the old brackets?  

The relevant code segment follows:

\score {
   \notes <<
     \context ChordNames \with { voltaOnThisStaff = ##t } {
         \transpose c a \changes
     }
     \context Staff = one \relative d' {
        \set Staff.instrument = #"Alto Sax"
        \key c \major
        \time 4/4
        \clef treble
        \repeat volta 2 {
                %NOTES GO HERE
                }
        \alternative {
                {
                %MORE NOTES
                \bar "||"}
                }
                %NOTES AGAIN
                \bar "|."

     }

     %OTHER STAVES FOLLOW
-- 
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  GMU/O d+@ s: a C++ UL P+>++++ L++ E-(---) W++ N++ o--@ K- w+(--) !O !M V 
PS--(+) PE++ Y !PGP t+() !5 X+() R+++($) tv b++>+++ DI@ !D G e++>++++ h---@ 
r++ y?
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