i had exactly the same problem and got into a few arguments regarding torque. after 5 trys i just removed the adjusters, and torqued the snot out of it. my point at the time was that the axle alone should stay put without the aid of adjusters i didn't damage the wheel bearings and there wasn't any more friction from over torqueing, i did my wheelies and it didn't move. however since then i reattached the adjusters and torque to spec, bottom line is we're all ridin it against the adjusters and if you don't believe me back them off and go for a rip and you'll see the chain go slack.
now you got me goin, so if you get a flat and you break out your cheesy tool kit you can barely break the axle nut loose at factory specs let alone if its torqued enough to actually handle 100 rear wheel, so they put on the adjusters cause its safer easier blah blah.
take your time, keep the nut fairly snug, just loose enough to let the adjusters move it, then bear down. it ain't gonna move if the adjusters are against it.