Hm...

The reason I chose that wording is because item ID does show you what items are newer versus older. I know a lot of people use the item directory to look for new items when we have holidays or events, so I thought that would be clearer than just putting "Item ID" - since it might not be obvious that item IDs correspond to the order items were added to the website.

I do see how the current wording could make you think there will be a timestamp on the items though. Do you have any suggestions how we could tweak the wording to make it clearer?