It makes sense that the name of Saint Joseph should be included in every Canon of the Mass so as to conform to the mind of the Legislator (Blessed John XXIII), who included the name of Saint Joseph in the Canon of the Mass when there was only one!
The furthest thing from his mind was multiple Canons! On the other hand, the Council is the work of the Holy Spirit which is much greater than the mind of the Holy Father, by definition! So, the great Pontiff of the Reform of the Reform (Pope Emeritus Benedict the Great!) had approved the action of the addition and most appropriately his humble Successor His Holiness Pope promulgated it. And there you have it!