Slitherine

Looking through the rules I noticed that if artillery is captured it becomes poor. I think it remains poor even if its original owner recaptures it. Is this the correct interpretation?

Yes. It says any switching of sides makes the arty Poor and Steady (p127)

ah...so it would have lost the disruption in our game...

Forgot about the steady part but I thought they dropped to poor, so even recapturing them won't bring them back. Added incentive to keep them out of the filthy clutches of your heathen foes