10ch,

I think the idea is that if thinks shift on the rack it is better for them to shift back and fall off than to shift forward and jam the back wheel up. That's always been my assumption. Plus you can have extra long loads that hang over the trailing edge of the rack, whereas the other way around you are a little limited.

That being said, if you like it the other way and it works for you then why not keep it the way you like it?