fc7 packages in fc8 Everything

[Martin Marques]

Why is it that there are .fc7 packages in the fc8 Everything repositories?

I found out installing pygame, but looking at 
http://mirrors.vexs.net/pub/fedora/linux/releases/8/Everything/x86_64/os/Packages/ 
(others are the same) I found a lot of fc7 packages.

Shouldn't they all be fc8?

BTW, after upgrading Fedora 7 to 8 I have a lot of .fc7 packages 
installed, and I want to know if it's OK.