It is odd that he has caps for multiple countres. Caps are given out after a game to show you played in it. You can only play for one national team, unless you renounce your citizenship and have family from another country, it is then that you play for another team. In england rugby and football (soccer) are big, but rugby is only for the upperclasses ( which is why I play =P). Perhaps you could google his name, as there are databases showing exactly who has played for each team.
As to whether it is a big deal, that is for you to decide.