Fixed bugs

Model/BuildOrders/BuildOrderModel.cs

@@ -94,7 +94,7 @@ public class BuildOrderModel
         return (from ordersAtTime in StartedOrders
             from orders in ordersAtTime.Value
             where ordersAtTime.Key + (orders.Production() == null ? 0 : orders.Production().BuildTime) <= interval
-            where orders.Harvest() != null
+            where orders.Harvester() != null
             select orders).ToList();
     }
 }