Your rifle is most likely fine. You're riding the bolt. My VZ2008's work perfectly and will do the exact same thing as yours if I ride the bolt. Pull the bolt back like you're mad at it and completely let go when the bolt is at the back and let it snap forward. All guns should be racked like that, although not all need it. You can rack the bolt with all your might and force and you will still not come close to applying the punishment that normal live-fire cycling will.
The action will smooth out with use, but even then it will hang up if you ride the bolt.
If you open the dust cover and play with the safety selector you'll see why it will let the bolt go.
All that said, you may still have a Gremlin, although unlikely as 99% of the Gremlin reports are with makes other than Century and with Century's 2nd generation, where they weren't legally able to tab the carrier. My two rifles shot 1,000 rounds perfectly and still got them tabbed for long term reliability. The tabbing doesn't do anything except lengthen the amount of time the disconnector is pressed down; we're talking about fractions of a second. It's very cheap insurance.
Try racking the bolt with authority, take it out shooting, and see how it does. If you send it back to Century now, they'll probably find nothing wrong with it and send it back to, with several weeks turnaround. If there actually is a problem, Century is reportedly taking care of any issues with these rifles, which honestly are few and far between. I do recommend eventually tabbing the carrier.