Pinku - Are you sure that John did not know who the trbes from the sons Israel were? I hope your not getting confussed with the Divisions of 3s for the Exodus encampment and registration for military service. Remeber that Levi was placed in the centre of the camp, total 13 , and Levites were exempt from military service due to their temple duties. In reality John only lists 11 because Manasseh is only half a tribe and Joseph can only be the other half tribe.
The real question here is why did John choose to include Manasseh when they would fall under Joseph, and exclude Dan? It is worth noting that the order that these tribes are placed in reflects the order which they are placed around the gates of the temple in the new Jerusalem from the base of the west side clockwise.
Metatron - Have you consider the use of "and" as a full stop, that way it seperates the phrases and gives each part individual meaning as stand alone statements. It completely changes the way you understand text. Just a thought, btw read it in the greek as it is written not as translated with added meaning or implication.
BB