She's Moving!....Backwards?

This week Olivia started moving... backwards. She pushes up on her arms and as she tries to push up on her knees she ends up scooting backwards slightly. Before you know it she's halfway across the room! She doesn't seem to be trying to move backward, but she is definatley trying to get up on her knees. In one picture below she had started at the red toy and moved that far back!