MaxLength error message formatted incorrectly

The formatting of the error message resulting from a "MaxLength" restriction violation is incorrect. The message reads -

string length (string) is greater than maxLength facet (2) for 1

It should be

string length (2) is greater than maxLength facet (1) for firstInitialType in namespace http://www.medimpact.com

It looks as if the substitution is off by one position