If your new BB comes with a plastic ring, DO NOT torque it down to parktool specs. There have been several threads recently addressing this issue. I cracked one myself attempting to reach that torque. There is also speculation that torquing an aluminum NDS cup to that spec might compress the cartridge and cause problems.
In my search for a compatible replacement adjustable cup, several LBS mechanics told me they simply snug both fixed and adjustable cups. Your problem may have been that while the adjustable cup on most of these cartridge BBs is simply a contact fit on the face of the cartridge, there is a flange that should fit snugly, but not tightly, around the casing. Maybe your replacement adjustable cup was too wide in diameter? One shop I visited recommended using plumber's tape to fill the gap.
I probably have about 25 miles on my BB, which I tightened pretty well on the drive-side and just snugged on the NDS (though the cup this time is aluminum). Hasn't loosened yet.