The Phase Shifter module has 2 sets of outputs. The first set outputs the signal at stages 7 and 8 while the second set outputs the signal from stages 15 and 16. The numbered outs (7,8,15, and 16) contain just the phase shifted signal after the selected number of stages. This signal is not mixed with the dry (non-shifted) signal. The Mix outs take the phased signal from either stage 8 or stage 16 and mixes it with the dry (non-shifted) signal.
The Phase Shifter is shipping now.
Read more about the history and theory behind the phase shifter on the Pittsburgh Modular Phase Shifter page.