Robert,
They come out of the pack with the concave grind. After they're filed and sharpened the cutting edge really should be one continuous straight edge. Most of the "work" is done to the front end but some has to come off the back too.
Do you have the Tru-Angle with files or stones??? The one with the files will straighten the edges pretty quickly but the one with stones will take a long time because that's a hone intended primarily to polish and refine after the head is shaped on something much coarser and aggressive. Sending you a PM,
Ron