Once again not even your statement outright states that the church officially ordained anyone a priest at the Last Supper.  Yes, I who was also called by God to be an ordained priest in our church, believe Christ did institute a form of sacred ordination from the symbolism of the Last Supper which included the 12 & many other male & female followers.  This symbolism as shepherd & sacrificial lamb is to be carried on thru others.  However, we do not state that this was in Jesus' or the Apostles belief, at the time, an actual ordination to Catholic Priesthood & it if we did we would be in error.  I believe men & women are called to lead as shepherds (Priests) in our church & to preside over our other sacraments too.  I also believe we (the church) are abusing the ordination sacrament as a tool for sexism. 

You also need to recognize that this rule too is not ex Cathedra & therefor can be found legally to be completely flawed as a law/tradition or found to be containing some weaknesses.