At one point I worked with and set the Display Order for the models in my shop via the
Inventory page. But.. it's been a while since I did that.
The order specified by the Inventory Page appears to be the "Default Order".
What has happened here is that I got behind on setting the Display Order, so several of the newer models do not have a number for the Display Order.
It also appears that these same new models (uploaded after Aug 13, 2013) have a DisplayOrder of Null.. that may be a change.. I believe that before they were assigned a DisplayOrder at the END of the list.
With that field in the database being null, those models are being sorted to the top of the list, and they are then in order by Upload Date or Model#.