footnote citation trouble

I'm having some difficulty with footnote citations for
journal articles.  I'm using a modified form of the
Endnote-supplied Chicago 15th A (I've used asterisks in
lieu of the normal symbol for link adjacent text): 
Author. "Title." `Review of`*Reviewed
Item.|*Type of
Article.|*Journal|*Volume|,*no.*Issue|*(|Date*|Year)|Pages|.*Alte
rnate Journal|,*URL|*(accessed*Reprint Edition)|. 
The crux of the problem seems to lie with the
*|(|Date*|Year) section of the style.  When the shortened
form of the citation appears in the footnotes due to a
repeated citation, the citation ends with: 
,"  (  
as opposed to the correct: 
," 
The stray open parentheses seems to be coming from the open
parentheses in the section I mentioned above.  If one
removes the forced separation from between the open
parentheses and Date, then the shortened form of the
citation turns out fine, but if a reference happens to be
lacking a Date, then the open parentheses vanishes in the
long version of the citation, creating a whole new problem. 
The only semi-solution I have found is to remove Date
entirely from the equation, but this is not satisfactory
either.  Has anyone else encountered/solved this problem?

Many thanks,
Jeremy Abbott

Jeremy Abbott, Administrative and Bibliographic Assistant
Collection Management Group
Northwestern University Library
1970 Campus Drive, Evanston, IL 60208-2300
Email: j-abbottnorthwestern.edu
Phone: (847) 467-5675
Fax: (847) 467-7899