I do believe that 1 Cor 15:20 is one of the most miss-understood verses in the non-Jewish Christian community. that being said because of the lack of understanding of the Laws of Harvest, and the choice of wording used in translating the Greek word Ginomai in 1 Cor 15:20. The two firstfruit loaves are prepared with Leaven (yeast), We know Christ is the Un-leavened bread ... and he is the Lamb offered with the two loaves in the wave offering performed by the High Priest in the offering of the firstfruits to God fifty days after the beginning of harvest,(mistakenly referred to as firstfruits) that is the day Our Lord was raised, the day the sheaf of firstfruits (called the Omer, the amount of weight of the first cut of ripe Barley) is waived before God. Fifty days after Christ was raised is the firstfruits offered to God.
Paul in the 15th chapter of 1 Corinthians is teaching the assurance of the resurrection, the firstfruits is a resurrection event of those chosen by God, just as ingathering (Tabernacles) is also, and Christ has become (Ginomai) both of these events... and Paul goes on to confirm the order of the resurrection... Christ, the firstfruits, then those who are his at his coming (Ingathering) ........ Christ did not become (as to imply-translated into- the leavened bread of firstfruits)...
The dead shall rise FIRST then we who are alive and remain shall be caught up ! at his appearing.
http://www.resurrectiontruth.com/
21 For He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him. 2 Corinthians 5:21
Jesus became sin, for us.
Jesus is the First Fruits offering.
Then afterward those who are His are gathered at The Harvest.
One Harvest at the end of the age.
One first fruits offering, Jesus and jesus alone.
That is what the scriptures teach.
There was not two first fruits offerings.
Jesus is the first fruits offering.
23 But every man in his own order: Christ the firstfruits; afterward they that are Christ's at his coming. 1 Corinthians 15:23
They that are Christ's means just what it says.
All who are Christ's will be gathered at His Coming.
His Coming is at the end of the age.
His Coming is after the tribulation.
JLB