That warp should not be a problem as long as you are aware that it is present. If you look at the bottom pic you can see that the edge is fairly even. I can safely assume that that is the edge facing you when you hone, meaning you are "pulling" the razor towards you and that is the edge on the stone. That is a more "natural" feeling and so you have better control and even pressure along the edge. It is when the edge is facing away from you that it becomes an awkward action and so you do not get the even pressure along the edge. You can see that by the way the edge is more pronounced on the heel and toe of the razor. One way to combat that is to use your free hand on the razor to help apply a constant (but light) pressure along the entire edge of the razor as you are "pushing" the razor away from you. If done correctly, that will also help in reducing the effect of the "bow" or "warp" on the edge.