Can't make contracts for supplies with fractional consumption

When making local and common market contracts, the minimum amount that can be contracted is 1 unit. But several corps consume less than 1 unit of various supplies per month. Closing a contract anyway causes the corp to receive more supplies than it's using every month, resulting in an endlessly increasing stockpile of that product.

The corps I know are affected by this are Airforce Maint, Assets Maint, Mil Bases Maint, Navy Vessels Maint, Off Weaps Maint. There might be others.

Actually, seems it's even worse than I thought. After a while (150 months' supply in the case I'm using to test - contracting hospitals to an asset maint corp) the contracts keep executing but the supplies don't get added to the receiving corp's stockpile. So it's just bleeding money.

It's always been that way.
Use the trade with your own corporations link to sell excess supplies to your country or ceo then offer on the open market, direct sale or direct contract to another player.