Custom fields stock control bug

[smird]

Use J2.5.8 and VM 2.0.20

Found strange behaviour of Cart Variant Custom field (not a stockable variant). If you create such custom field "Size" for the product with only 1 item on a stock, then it will still allowed to customer to order at least 1 item of each size. Is it a right behavior? And are there any way to fix it?

My problem is that the shop sells rings, which size may be changed. So, there is only 1 ring on a stock, but the seller wants the shopper to be able to choose the size from the drop down. As a result the shopper may order 3 rings of each size, while there are only 1 in a stock.

[smird]

Is it possible, that this bug will be fixed in next version?

[smird]

No help???