Contracts are hard coded by Giants so not something i or the map can change or influence.
Productions that do or don't appear in menu's isn't a map issue and again is hard coded by Giants, there are no custom productions built into the map.
How could the issue be with the code from Giants? These productions appear in the menu on the Etruria mod map, they work (there are triggers), and they can be sold. On the Riverbend Springs map from Giants, it's the same, no problems. On your map — my productions are not in the menu, there's no way to put them into operation, and no way to sell them.