Deecar, the same thing happened to me. I had a terrible time with this game technically, with many crashes, freezes, missing cursors, etc. When I got to the graveyard Jack wasn't there either. I checked several wt's to make sure I did everything. And I did but still no Jack. At first I didn't go to the shed but then I did and still no Jack. All the wt's said that he would confront me, but he never did even when I finally got him to appear. What I eventually did was shut down the game and then go back to my last save. With this game I made a habit of saving every 5 minutes or so especially when I entered a new scene or knew a closeup was coming (my game would usually freeze, crash or I'd have no control over the cursor for about 5 minutes while the closeup was trying to spin up). By shutting down the game and reloading my save - I was still in the graveyard at this point and suddenly Jack appeared and I was able to complete the grave sequence (and finally the game!!). Try that. I hope this works for you. And note: I never was able to get a confrontation from him, but I did get him to show up and have him follow me as I placed the gravestones.
Good luck!!