In Matthew 25:31-46 we see the sheep receiving the rewards not the goats.
You seem to be thoroughly confused.
That person who was saved in 1 Corinthians 3:15 was still a sheep.
It’s describing a Christian who had some of his works burned up.
I agree with you, brother.
There is only one Judgement.
I believe we are initially and foundationally saved by God's grace through faith in Christ, but we must also enter the Sanctification Process as a part of God's plan of salvation. Sanctification always happens after being saved by God's grace. Sanctification involves good works, holy living, and putting away sin.
Many today want to justify a sin and still be saved type belief. They distort the parable in 1 Corinthians 3 without really fully understanding it.
What is the true meaning of the parable of the building,
and it's materials in 1 Corinthians 3?
Well, Paul says before the parable, "you are God's building."
So we are the materials that make up the building.
The work is not referring to just any kind of general actions of a believer like good fruit (any kind of good fruit) and evil fruit (sin). The work is referring to those believers we bring to the faith and their current spiritual status with God (i.e. what kind of building materials are they made up of). The Parable is talking about Paul's work (Which is the Corinthians in this instance).
I believe Paul and the other apostles are a part of the foundation with Christ being the chief cornerstone or the ultimate baseline foundation (Ephesians 2:20), and that Paul's work in the gospel are the result of the Corinthians being initially saved by the gospel. However, Paul is now concerned that his labor in the gospel (concerning them) is now in vain because the Corinthians are now working the sins of strife and envying (Note: Paul condemns the sins of strife and envying when writing to the Galatians (Galatians 5:19-21). Paul says that they which do such things will not inherit the kingdom of God). In Galatians 4:11, Paul was concerned for the Galatians in that they were going back to the Old Law so as to be justified or saved. He was concerned that his labor for the gospel was in vain for the Galatians.
So the parable speaks of how his labor for the gospel (concerning the Corinthians) was now possibly in vain for them, too.
#1. The chief cornerstone foundation = Jesus Christ.
#2. Built as a part of the foundation on top of Christ = The apostles (including Paul, etc.) (Ephesians 2:20).
#3. The actual building materials of the tower or building = God's people (In this instance it would be the Corinthians).
#4. The Corinthians would be like: Wood, hay, and stubble in this particular point in time within their life while they abided in their sins of strife, and envying (Which are sins that will cause a person to not inherit the Kingdom of God).
Wood, hay, and stubble are not materials that could survive a fire.
#5. Paul (the soul winner, and builder of the gospel and builder upon the foundation of Jesus Christ) would be saved through the fire (despite his work - i.e. the Corinthians being his work) would be burned up because of their sins. For Paul then says that if any man defiles the temple, God will destroy them (Meaning: God will destroy the Corinthians if they do not repent of their sins). We are the temple of God. Our bodies are the temples of God. If we as believers defile our temples by sin, God will destroy us (i.e. condemn us).
This is what I believe the parable is saying. The works of Paul that will be burned are the Corinthians if they do not repent of their sins of strife and envy (1 Corinthians 3:3). The Corinthians at this point in time are not saved and they will be burned up in the fire and destroyed by God if they don't seek forgiveness with the Lord and turn from their sins of strife and envy. Paul, the apostles, or the gospel preacher is the one who will be saved through fire if his work (the Corinthians) is burned up (on the account of their justifying sin). OSAS folk falsely think the parable is talking about how a believer can sin and still be saved as long as they have a belief on Jesus. But it's actually teaching the exact opposite of that. One cannot build sin as a work upon the foundation of Jesus Christ. Jesus did not advocate sin, and neither did He teach that a person can continue to sin and still be saved.
Yes, we are initially and foundationally saved by God's grace, but believers cannot justify sin, and they have to be fruitful for their Lord and live holy as a part of the Sanctification Process.
For Hebrews 12:14-15 says,
“14 Follow peace with all men, and holiness,
without which no man shall see the Lord:
15 Looking diligently lest any man fail of the grace of God; lest any root of bitterness springing up trouble you, and thereby many be defiled;”