I wouldn't worry about the date, but the .001 is an under size for a well worn or heavily polished crank to raise oil pressure. I never used them because quite often they would get too tight when the engine was warm. Another practice was to use 1/2 .001 undersize and the other standard to give .0005 under size. It kinda looks like this is what someone did. I would either mike the thickness of the bearing with a ball anvil mike or use Plasti-gauge. If they are within spec, I would put them back where they from. Otherwise you may open a can of worms.