Also, if supplies get ordered at the 'wrong trade strategy', then they could sit there not buying for a very long time.
Check Corporations > retract (or cancel) material orders, then you could select, and retract some or all offers. If so, it essentially 're-starts' the ordering process. That would take a few world months to get going, though.
In the meantime, you can use your country to buy supplies (Trade > products in stock > [use immediate orders]), then use Trade > Local Trading with own corporations > sell [choose product], and sell supplies to your State corporations for the short-term.