Canning Town is a numbering shambles, very conveniently for interchange the main DLR island is on top of the Jubilee Line island, while there are separate DLR platforms in an effective annexe opened later, to access which you have to go right down to basement level, find various passages, and come back up again.
Despite this, it is the annexe which is numbered 1,2, the upper level DLR 3,4, and the Jubilee Line, nearest to the entrance, is 5,6. Furthermore this numbering is used on the couple (only) of screens around the place, with no indication at those screens of where the platforms actually are, you then have to seek out separate signs for that. And still no indication that one DLR is right here, and the other several minutes (and it is, via three escalators/sets of steps) walk away.