Reply by JohnChung

Here are my thoughts.

1) The DMT can be used to set the initial bevel BUT it will wear faster…. I would keep it for flattening stones.
2) Veritas Jig non-uniform bevel being set across plane iron. This was a question I started with when I started to question how reliable it is. It is NOT exactly square between the bevel and the side of the blade. If you used a square and check, it would be off quite a fair bit. But the key is to have a sharp edge. You can use the lateral
adjuster to ensure that the bevel is square on the sole of the plane.

It is possible while sharpening that the blade would have shifted in the jig. Try to reset the iron in the jig and make sure that it is clamp down tight on the blade.