Blender SMD Rig Double Bones?

[BlueCube]

I'm using Blender to model a player model for Gmod.
I have imported the basic male rig using the .smd importer.
When imported everything seems to work fine but most if not all bones appear to be doubled, like instead of one bone at the knee, there are two identical bones (sometimes in slightly different positions) with the exact same name.
I'm wondering if I need the duplicates/can delete them or if the .smd importer isn't working right.

Here's a screenshot of what happens:
[IMG]http://i.imgur.com/inYBg9h.png[/IMG]