EY PLL gave an error for the fiber polarization again. The fiber trans in the wrong polarization had drifted back to 36%. I turned the controller back on and this kicked the EX polarization to 40%, and brought EY down to 25%. I then adjusted both channels and brought EY to 10% and EX to 13%.  This is similar to the behavior seen in alog 11505. I am wondering whether the controller only holds one channel when we turn it off...