I'm going to put my “Bush Lawyer” hat on here (and hope a proper lawyer corrects me if I'm wrong) and say that since you are a member of the Owners Corporation and the OC paid the legal fees, then you are absolutely entitled to see what the lawyers said. The Executive Committee is subject to the controls of the OC; it's not an executive that can act independently.
Your lawyers should demand to see the legal advice that was given to the EC by the OC's lawyers. If this issue ever came to court, your lawyers would be able to demand to see all correspondence between the EC, their lawyers and your strata managers (for instance).
I'm reliably informed that there is no such thing as private correspondence within a strata plan – every member of the Owners Corporation (that's ALL owners) are entitled to see anything written to and by the EC.