daily production

Hello, I have conquered a castle. When I wanted to expand this, there was the following problem. The percentage of construction progress was always in the negative range, even below -100%. My production should be at +24 according to the values. However, -10 is displayed. Attached a picture. In...

Am I just incompetent or is managing cities or castles often broken or lacking something. I have 3 fiefs and all are examples of problems I'm having with managing them. Problem 1: Daily production. I don't really know what this is/what defines it I only know that it is affected by prosperity...