I'm with you -- my Douay Bible has several verses
in the books which are included in the KJV that have been entirely left out of the KJV. Also, a major difference in interpretation in the Christmas story. In the Gospel According to Saint Luke, when the angel appears to the shepards to herald the Good News, the verse is translated, "Peace on Earth to men of good will,"
not "Peace on Earth; good will toward man." I tend to go with this Douay translation, as it puts the onus on MAN to maintain good will in order that there be peace on Earth. The other sounds as if peace on Earth is simply to be a gift from on high.
Bible study is the same as the Bible itself -- one man's interpretation given to another man. Just so with the gift of Faith, religion, I think each person interprets as he sees things. And will only find the true answers when he reaches his Final Reward.