Cleaning up Inventory Quantities

We recently did our end-of-year stocktake and wrote off some old stock. We sell in part quantities. Our stock count sheet said we had 1.5 metres of fabric. So In the stocktake adjustments,(adjust inventory)  we wrote off the 1.5metres.  However, despite the Items register saying we have no stock, Items list show a much larger negative amount.  Here is a screen shot below:  

 I have tried changing the value of the write-off, but it either says, 'you can't have a negative value', or it sits at 0.02. instead of Zero. And I can't get the Items list to say zero quantity. We have several products like this. Hope someone can help.