Maybe that is just your DC4, because mine hasn't got any problems like that. I saw on a few reviews on heinnie that some were sent out like that and had to be replaced.Personally I dont like the DC4 The diamond side is far to coarse and the ceramic side (I have) is uneven, the wet'ndry on a board (2"x6" is a good size to start on) is an inexpensive and very good method of sharpening when done properly
i think i will also make a set of the wet and dry sharpening boards, they seem to be highly thought of on this site!