Half of one, half of the other?

Is it just me or is there something odd about an artist who comes out with a Greatest Hits disc after just two regular CD releases?

So what exactly goes on the greatest hits album? Granted, maybe one or 2 "previously unreleased" tracks, but then what else is left? Parts of the other two albums, right?

Doesn't that hurt record sales of the original releases?

Where the tracks are now labeled as "not the greatest hits?"

-Kirk