I'll take a stab...
First I'll point out that your view above is at direct odds with this:
Hebrews 9:24
For Christ has not entered the holy places made with hands, which are copies of the true, but into heaven itself,
now to appear in the presence of God for us;
How often does Jesus travel from earth into Heaven to present His perfect sacrifice for us?
Based on your statement and this passage from Hebrews, you must believe at least twice, right?
But scripture says
only once:
25
not that He should offer Himself often, as the high priest enters the Most Holy Place every year with blood of another— 26 He then would
have had to suffer often since the foundation of the world;
but now, once at the end of the ages, He has appeared to put away sin by the sacrifice of Himself.
If I understand you correctly, you are asserting that, sometime after He came out of the tomb and appeared to Mary, but before he appeared to His apostles, that Christ ascended to heaven and presented Himslef as the firstfruits offering, then returned to earth once that offering was accepted By God.
If this is your position, I still don't see How you can reconcile it with
Hebrews 9:24?
"For Christ is not entered into the holy places made with hands, which are the figures of the true; but into heaven itself, now to appear in the presence of God for us:"
The writer of Hebrews, writing in the 60's AD, some 30 years after your proposed "ascention & return" claimed that at the time he was writing, Christ was presently in heaven offering himself as the sacrifice for us.
Your view has Him offering Himself the 2nd day after Passover, returning, then ascending again and offering himself AGAIN, which the writer of Hebrews explicitly says CAN NOT BE:
Hebrews 9:25-26
"25 Nor yet that he should offer himself often, as the high priest entereth into the holy place every year with blood of others; 26 For then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself.'
As for why Jesus made the 'don't touch me statement', He actually told Mary not to "Cling to" Him.
John 20:17 NKJ
"Jesus said to her, "Do not cling to Me, for I have not yet ascended to My Father; but go to My brethren and say to them, 'I am ascending to My Father and your Father, and to My God and your God.'
The Greek for "Cling" or "Touch" here is "Haptomai" which means:
to fasten one's self to, adhere to, cling to.
This is not a simple finger extended "touching" of Christ being described here as Thomas did, this is Mary seeing the risin Christ and, not surprisingly, CLINGING to Him.
Jesus tells her not to Cling to Him, in effect because Both He and She had important work yet to do. They would have an eternity to cling to eachother, but Christ effectively told her to "let go" at that point because there was yet unfinished business they both needed to attend to.
Christ ascended to the Father once, and it is recorded for us at the beginning of the Book of the Acts of the Apostles.