This is one of these notable differences.
In my lodge, the Junior Warden is in the North and the pillar has a B.
Another lodge that uses the same place, has the B on the other pillar, but the JW in the North as well. Therefor the password for the first two degrees are the other way around than with us. (J for EA and B for FC.)
In both cases the Warden has to oversee the "column" (the bench where people with no function take place) on the same side (looking or walking alongside people), but in other lodges on the opposite side (S for the JW), which makes it easier to see if everybody has the sign right.