I think I figured it out. I think you can see the pictures by going to
http://photos.yahoo.com/hotwheels514

The first pic is as you are walking down the stairs. The second pic is
kind of looking up at the sistered joist as you are walking up the stairs.
Made a joist 'sandwich' by bolting all 3 pieces together. You can see in
the middle on the left the piece of the original joist that was cut out.
It has two little nails in it, just a piece of 'filler wood'.