29 Tudor body wood question

[fred93]

The wood that is above the quarter window and door opening seems to have a 5/8" wide X .101" different level than the rest of the wood.

Please see pix attached.

If I was to nail the interior panel to the top edge of the wood I would have a curved panel--that doesn't seem right.

Should I shim that upper section to be even with the bottom section???

This 5/8" X .101" extends from the A pillar to just past the side quarter window on both sides.