woc is at about 260m total xp, which for tanks, monks and spies just happens to be 100m overcap.
it's a pain, and as countless threads have already said, would be good to be seen changed, but a pe's cap is only 30 million, which is really easy to cap, so just a 100m overcap for woc would be unfair to other classes.
just saying make everything 100m overcap is too simplistic