No. That's exactly the point. The reason we don't say Raito is because we're not trying to speak Japanese, we're speaking English so we say Light. Therefore they don't say Light, they say Raito since they're speaking Japanese not English.
This concept is not that confusing.
Anyway, carry on with the Noein jack. I watched half the show and then deleted it off my computer to make room for the new season. Think it's worth just buying the boxset for about $20-$30?