Merchants don't come again

[1234567]

I really don't know why your map is doing this. It's not normal for anything to demolish over 100%. Checked with Kralyerg and he is also at a loss.  There are more issues with the biggest maps, especially when populations are high.  It's like the AI just can't keep up (that's why I wondered what speed you are using).  Sounds like you've already exited the game then gone back in and that didn't clear things.  Sorry we don't have a fix for you.

Nevermind. I am so lucky that I have a backup save in few years before so I can continue playing the game without the weird situations 
thanks so much