Go to Pintagle to learn this stitch and what TAST stands for.
I tried to place the beads in two ways, between the knots and in the knots. It was much easier to get a good even look when the beads are placed between the knots.
Compare, black beads between and pink beads in the knots.
The silver beads are also placed between, but they are worked down the right side (lefthanded stitches?) and the thread has twisted them slightly out of place.