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Alternator #2 is 14.8 which is the regulator set point so it's ok. Alternator #1 is 13.8 and that is low. If the battery is ok and just discharged it should eventually come up to about 14.8. If it doesn't come up to 14.8 or within a couple of tenth's of a volt about 5 minutes after starting the...

What were the good voltages?

Why don't you try using that meter to check the battery voltage at each battery while the engine is running instead of looking at the idiot lights? The battery voltage should be over 14 with the engine running unless it is dead. Alternator #2 has nothing to do with alternator #1, which you say...

Are you sure the alternator works? The battery shouldn't be dead after you have been driving the vehicle. I can't tell what scale your meter is on but assuming it's showing 830mA load, that would take a day or two to kill the battery.