While Oakley reports inventory to ExpertVoice daily, their inventory is not exclusive, and is shared with hundreds of other retail sales channels. It is common for an item to sell out via other sales channels before an order is placed on ExpertVoice.
When this happens, Oakley will cancel the out-of-stock items from your order.
Unfortunately, If your order is fully cancelled, you will not receive an email notification of the cancellation.