Possible Trade Site Bug

So I think I found an interesting bug on the trade site.
I have a weapon which is shown having 477 Physical DPS.
But when I search for the weapon with 477 Physical DPS it does not show up.
I have to lower the DPS to 475 for it to show. When I search for 476 or 477 it does not show up even so it says that it has 477 Physical DPS.