Helmsman put the helm over to turn to starboard (the right looking at the front of the ship)...
However, a ship (or any boat with a rudder) - will always "run wide" - in this case, the bow turns to starboard, and the stern swings to port. Basically, the ship will pivot about the centre.
Put it down to helmsman training - possibly (from RYA instructors' facebook) the bridge is quite far forward, so it isn't as obvious as normal what's happening behond!
Colin