Yea, they previously showed 10 O405s from WLBP, with 1 extra
bus. Then, the extra bus taken out, got 9 O405s now... That's why I
asked which O405 is out of 961...
According to sgwiki, when 961 turned WAB, there is 8 O405. Then
TIB536D went in, so become 9 O405 and 536D is the extra bus.
However for some strange reason, the extra bus note suddenly
disappeared but the 9 O405 stayed there. On the other hand, Ive
never seen 522T on 961 ever since WAB status.