Hebrew scholars say that statement in the OT does NOT translate-i am that i am--It translates i will be what i will be. I am that i am was put in to mislead.
"I will be what I will be" conveys the same point as "I am what I am" - that God makes of Himself what He chooses to be whenever
He so chooses to be it. The point being that He will not be constrained by physical limitations/characteristics of a cosmos that He created.
[Jhn 5:18, 23 KJV]
18 Therefore the Jews sought the more to kill him, because he not only had broken the sabbath, but said also that God was his Father,
making himself equal with God. ...
23
That all [men] should honour the Son, even as they honour the Father. He that honoureth not the Son honoureth not the Father which hath sent him.
Jesus didn't become savior until he completed dying for the wages of sin he did not owe. He could have failed, its why satan tempted him in the wilderness. Until that point, only YHWH was savior.
How did you ever come to that conclusion? I know of nowhere in the Bible where anything even close to that is stated. Sorry
to say this, but it sounds like you've formulated a doctrine of your own making without any biblical basis for it- the logic you use is faulty. Trying to rationalize it into something comprehensible is like trying to force a square peg into a round hole - it just won't fit.
Only God is/was the Saviour and will be so for eternity. For there to be more than one Saviour, or if God had switched from Himself to Christ (I guess that's what you're saying), becomes an absurd proposition. Since (according to you) there already was a Saviour, why would another be needed? You encounter severe logical difficulties by trying to make out of one, two. Saviour is a title, one that Christ alone assumed in eternity past. Christ, being the Christ, was foreordained Saviour before the foundation of the world. The completion of Hs offering was on the cross, but nevertheless, His ordination to that title was from before the foundation of the world. Therefore, it would be a logical impossibility for more than one Saviour to have ever existed, and for that one Saviour to not be Christ and God.
[1Pe 1:18-20 KJV]
18 Forasmuch as ye know that ye were not redeemed with corruptible things, [as] silver and gold, from your vain conversation [received] by tradition from your fathers;
19 But with the precious blood
of Christ, as of a lamb without blemish and without spot:
20
Who verily was foreordained before the foundation of the world, but was manifest in these last times for you,
[Gen 22:8 KJV]
8 And Abraham said, My son,
God will provide himself a lamb for a burnt
offering: so they went both of them together.