Well we are a kindred spirit, I started with the NIV too. When I saw the NIV called Jesus and Lucifer the morning star, it confused me and in my search for truth I kept finding more and more things wrong. Then I changed to the KJV.
In Hebrew, the word Cochav can refer to one of the lights in the night sky, or to an angel of light.
Job 38:1-7
Then the Lord answered Job out of the whirlwind, and said,
2 Who is this that darkeneth counsel by words without knowledge?
3 Gird up now thy loins like a man; for I will demand of thee, and answer thou me.
4 Where wast thou when I laid the foundations of the earth? declare, if thou hast understanding.
5 Who hath laid the measures thereof, if thou knowest? or who hath stretched the line upon it?
6 Whereupon are the foundations thereof fastened? or who laid the corner stone thereof;
7
When the morning stars sang together, and all the sons of God shouted for joy?
KJV
the morning stars here refers to angels of light of which Satan/Lucifer was created to be one; as were Michael and Gabriel.
Isa 14:12-13
12 How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations!
13 For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north:
KJV
Isa 14:12
12 How you have fallen from heaven, O morning star, son of the dawn! You have been cast down to the earth, you who once laid low the nations!
NIV
Here the NIV uses the designation in Job 38:7 to show what Satan/Lucifer is.
Rev 22:16
16 I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, and the bright and morning star.
KJV
bright and morning star here is a title of Jesus; but as seen in Job 38:7 NOT exclusively a title of Jesus.
Perhaps this resolves the confusion.