Shipwrights??

What seems to be the problem with these things?? In my current game I conquered a city with a shipwright in it. As I looked in the tradescreen I saw the flashing icon. It indicated that my trade was 1300 but was about to go to 300!!!

Then I ran a little "test". I destroyed the shipwright and build a port to see if it was ok again and BEHOLD!! Trade was up to 1300 again.

What's wrong with thw building? is this a bug? Or is there a reasonable explenation why a better port would lead to LESS trade ~:confused:

Unfortunately, this does indeed seem to be a bug. I just ignore the flashing, and hope it'll be patched up soon.

I had the opposite - my trade route misteriously disappeared from a town with a port, but when i built a shipwright 2 routes came up instantly!