You cannot really do the above mentioned test for a good 45 minutes after closing all doors and connecting the current meter. There will be some items that are not yet in standby mode so the current draw may still be around 1 amp until that happens.
Have you verified that the brake lights are not on when this discharge happens? I've been seeing others, as well as myself, that have been having brake light switch problems lately with their Ford products. Mine was fine, then left me stuck at work one evening with a completely dead battery (around 4 volts).
-Rod