No, the DME is stirred in during the adding honey phase (best to do it before it cools too much, it's kind if a pain to dissolve). I added DME and honey after removing the grain sack, then rinsed the sack. The grains are the crystal malt listed in the ingredients.
Edit to add: the recipe yields 5 gallons, so definitely do the math if you want a smaller batch. I think you can substitute (I did), but the buckwheat honey should be used for the second racking. The flavor of buckwheat adds to the caramel flavor, you want to have some of that darker profile (alternatively, you can caramelize some sugar or clover honey, that would probably work too).
My only other change is that I plan to use Bentonite when I'm ready to clear. I prefer to avoid super kleer whenever I can, as it can (however unlikely) impart flavor.
I used regular store bought apple juice and cider (most brands they are the same thing). I'd shy away from concentrate if possible, but it should suffice, just figure out the yield of each can plus water, don't do a 1:1 can to gallon ratio. Good luck!