If you're referring to the fact that giving a control artifact to
another faction transfers a NP, then that's a feature, not a bug. If
there is any other way of transferring NPs, I don't know what it is,
but if I did, I'd make sure it was fixed, since NP conservation is the
most important system of the game, and it's the main reason that we're
still happily killing each other on turn 95 instead of having a
runaway winner.
-- greg (Oleg is not interested in game design...)