does anyone know why trains going from Canary Wharf to Poplar have
such a problem with stopping and opening their doors at West India
Quay?

for the last month or two it's consistently been unable to stop at the
right point, and even then, it waits a couple of minutes, shunts
forward an inch, and then finally opens the doors.

I figured this was something that would happen for a couple of days,
but it's been doing this consistently for much, much longer.

Also, why are they only using the dive-under at peak time and not all
the time....? What value is there it not using it off peak?