I don't have the dock. But if all Samsung and MS updates are run, and you haven't disabled any device drivers, then it should go back to be fixed or replaced promptly. It would be hard to turn off touch, and it sounds like it should go back, but do check to make sure the updates are done and drivers are installed (otherwise you may feel silly in a whoops not plugged in sort of way). Then if that didn't work, I'd ask Samsung for a return code.
I had the same problem when I first set up my ATIV, if you run all updates from the SW Update programme and updates from Microsoft, that should fix the problem. If that fails, you may have to do what I did and restore Windows 8 - but the beauty about Windows is that when you restore, you don't lose all your apps and files. You may lose legacy programmes on the desktop, but if this is the case, Windows automatically makes a list and tells you what was uninstalled. But the latter will definitely fix your problem as I experienced the same thing.
I haven't had any problems with mine, but if it worked at all, I would restore back to the date it worked & then be sure & do ALL the updates, SW & Windows. If it has never worked, I suggest returning it for a replacement, there may abe other things wrong as well. If you are confident enough you may restore Windows 8, as previously suggested, but I would do that as a last resort.
I'm curious, have you fully shut down? On rare occasion when I've left the computer on overnight, the touch features becomes buggy. Pressing the power button briefly only turns off the monitor. Holding the power button until the blue light goes off fully shuts the system off. It all works fine after that. If this turns out to be the fix, make sure you do the long hold shut down when you aren't going to use the tablet for a few hours. Also, using the windows program to shut down makes restart buggy. I only shut down with the power button.