Did you install the patch before or after you entered act 4? If you entered act 4 in an unpatched game, or with an earlier patch, the wine chest and key in the torch would have been generated already, which the patch may not be able to change retroactively.
If that is the case, you may have the same problem with the level 6 key, since before the last patch the golden chest incorrectly contained a level 1 BF key.
