I Jimmy Swaggart Expositors bible was thrust out there to bring understanding to all Christendom regarding a revelation of the cross. Brother Swaggart had received a powerful understanding about what Christ accomplished on the cross and our association with it. It helped me considerably. However, the brother would have done well if he had of stuck with just the Exposed revelation to which he came to understand. But like all men in ministry they tend to go beyond their intended ministry.
The Message of the Cross to which he teaches is profound and worth listening to. But when one is going to do a bible exposition, one will interpret meanings that one has no revelation on, so then you have man's understanding mixed in with God's.
We ALL will do this, so it's not exclusive to the Jimmy Swaggarts or other notables. We are convinced by what we know to be the truth, even if that perceived truth is error. The only way we know that we are speaking truth is by the power that follows. God will always confirm His word with signs following. Before we lose our heads on this one, a sign can even be someone "getting" what your preaching. This is what sets us apart from other religions, the power that follows when the word of God is actually preached.
Even when we say, "we have truth" that is still questionable until it's been tried. Personally, I have no truth, I am as blind as a bat.
But the Message of the Cross that Swaggart preaches is in my estimation, right on. And a much needed message in our generation.
As to your questions
1) the unfounded, Finis Dake pre-Adamite earth theory and 2) the surprisingly unorthodox stance on MT 16:24 concerning Jesus telling us to deny ourself and carry our cross and follow him.
The first question is not a salvation issue, it's just one's mans theory as to why certain things had existed at one time and no longer and we need to quell that nagging idea with a theory. Everyone of us have an opinion on some unfounded theory. Somehow it gets interwoven in our belief system, this can't be helped this will go on as long as man roams the earth.
The second, what exactly does brother Swaggart say in his Expositor regarding Matthew 16:24?