If it's you and your wife applying together, be sure to bring the original copy of your marriage certificate. They wanted to see ours, not just copies as indicated on their website.
DTV is already approved. ED visa studies are finished and the extension will be cancelled. I did not get a re-entry permit. I left Thailand specifically to get the DTV and am flying back in on that on Monday. This post is about whether or not I need to get a new TM30 upon arrival.