Here's how I explained it a few pages back.
The New Testament didn't exist but the scriptures did. The scriptures that are being twisted in 2 Peter 3:16 are Paul's. Notice what it says. Paul's teaching's are hard to understand and people who lack understanding twist his teaching's to their own destruction as they do the rest of the scriptures. "The rest of the scriptures" being the Old Testament and what was completed of the future New Testament.
2 Peter 3:15 and consider that the longsuffering of our Lord is salvation—as also our beloved brother Paul, according to the wisdom given to him, has written to you,
16 as also in all his epistles, speaking in them of these things, in which are some things hard to understand, which untaught and unstable people twist to their own destruction, as they do also the rest of the Scriptures.
Well for one the scripture says: (KJV)
2Pe 3:16 As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest,
as they do also the other scriptures, unto their own destruction.
"Other" surly doesn't mean "rest of". I don’t know what translation or maybe what we used to call paraphrased bible your quoting but it certainly is inconsistent with the original English translation. So, it’s very possible you’re reading something into this, due to the contrary text.
Therefore, Peter isn’t talking about the rest of scripture, and how you see that Peter is says Paul’s writings are scripture, just isn’t there. According to KJV. but in context all Peter is doing is verifying that Paul’s teachings and writings are in accordance to God’s wisdom, and should be treated as such, because anything of God should be treated as such.
Do you see it?
As they do also" is the key to understanding that Paul's writings were considered scripture.
Does this help any?
.
This just tells me you’re off the mark, sorry but you are. there were many copies good and not so good of all these documents now known as the NT. but it was the church that had to wrestle with and verify what was accurate according to the originals and not. I suspect it took a lot of prayer.