Hmmm, I don't read Greek, but have never heard that from people who can read it - can you provide source-data for that?
Comma not misplaced; http://www.wcg.org/lit/prophecy/comma.htm is a good starting point. And since Eternity transcends space and time - Jesus’ whereabouts over 3 days? UNIMAGINABLE (though we are also taught he ‘Descended into Hell’ perhaps to bring news of the Great Salvation? Most people have a poor concept of Eternity since mathematics fails ordinary folk at or near infinity. Assuming it is at least a million years you are here on this planet for about .00008 of it. Love one another!
English uses commas, not Greek. English translators inserted the comma where they thought it should be and quite possibly were wrong.