The bible never says that the two witnesses had turned to dust. It, as I remember, said their bodies laid in the street for three days. Are you saying that Lazarus had returned to dust before Jesus resurrected him? Are you saying that as soon as someone dies they are dust? Jesus didn't think so regarding Lazarus. A bodies components consists mostly of earth (dust) so technically, living or dead, man is but dust and there is no need for death to be referred to as dust. Carried to the end this is what you seem to imply. To most, I believe, after death, when the body corrupts (decays), then it returns to dust.
Your understanding is at odds with the biblical definiton of life: body + spirit = soul (living being). Upon death, spirit departs, body remains, which is just dust, decomposed or not.
And the Lord God formed man
of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living being. (Gen. 2:7)
... when Jesus had cried out with a loud voice, He said, “Father, ‘into Your hands I commit My spirit.’ ” Having said this, He breathed His last. (Lk. 23:46)
You asked questions that the bible doesn't answer, " where the body was, and how did He get out of the tomb " then you handicap him by saying don't tell you some things. One of the things you don't want to hear is " other supernatural stuff ". WHAT! You want someone to explain a move of God but to leave out the " supernatural stuff " You're joking right, LOL,LOL,LOL,LOL,LOL. Thanks for the laugh

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Explain to me then how did he get out of the tomb - as flesh and bones, then. Show me where was the incorruptible body, and how the shroud was neatly folded in its place. Actually there is a valid and biblical explaination - Lord Jesus was preaching to the demonic spirits in Hades during those three days.
For Christ also suffered once for sins, the just for the unjust, that He might bring us to God, being put to death in the flesh but made alive by the Spirit, by whom also He went and preached to the spirits in prison, who formerly were disobedient, when once the Divine longsuffering waited in the days of Noah, while the ark was being prepared, in which a few, that is, eight souls, were saved through water. (1 Pt. 3:18-20)