Unable to Revise Listing with variations

This is becoming a problem now for me. This was reported over the past couple of days in another thread.

 

This morning I had a sale on an item and while packing I have reaslised I need to revise the qty on 2x listings where this item is used to show out of stock.

 

But I cannot revise my listings due to some web site error. Very frustrating.

 

After the sale this morning if someone orders another one of these I am unable to fulfill the order because I cannot revise my quantities.

 

How should I handle this one? Any suggestions?