Why is my shipyard making a 5 turn unit in 1 turn?

Hi All

First time poster.  GalCiv3 noob; only 101 hours playtime.  Loving the game so far, much better than Civ 6.

I cannot figure out why my shipyard states 5 turns to make a "Corvette - Beam - Mk1", but churns 1 unit out every turn.

Please can you tell me what I'm missing?  I've uploaded a couple of pics to help

• Shipyard - http://i.imgur.com/MNz6Z8T.jpg
• Planet - http://i.imgur.com/Qy9IY8N.jpg

Thanks for your time.