I can understand that as you brake move away from the fork they need more reach. You need to accound for this in buying brakes so that the pads can hit the rims correctly. However, it won't have much effect on the bending forces, in your case I think it lowers the forces. It adds a downward component where horizontal effect on your brake rotates the brake upward. In any cases these are seen as tension and shear forces in the bolt and not bending. Post pics if you can.