[Plugin: WP-Syntax] Forward slash greater than shows up

When I try this Scheme code at the GeSHi demo site I get what I expect:

(define pam
  (lambda (datum . proc-list)
    ((apply compose proc-list) datum)))

(pam
 2
 (lambda (n) (/ n 7))
 (lambda (n) (- n 3))
 (lambda (n) (+ n 10))
 (lambda (n) (* n 7)))

but when I run it through Wp-Syntax (with no other plugins installed) I get

(define pam
  (lambda (datum . proc-list)
    ((apply compose proc-list) datum)))

(pam
 />2
 (lambda (n) (/ n />7))
 (lambda (n) (- n />3))
 (lambda (n) (+ n />10))
 (lambda (n) (* n />7)))

> />3

Forward slash greater than shows up before the numbers.