Hey, i built improved silos like this setup
http://i62.tinypic.com/20jlge0.jpg (the picture was taked now when i started upgrade)
problem is when the wheat field is full and improved silo automatical start work with a distant wheat field and closer wheat field going below 400 and improved silo again work on it then it show the path of the closest wheat field but the production time not changed back, still 8-12minute instead of 4min and x second when its showed its work with closest wheat field what was 300ish wheat.