You don't believe Paul is Scripture, but continue to use Paul to convince me of your position. Please use your own standard to make your case.
There are always people who are trying to create their own versions of Christianity, the Judaizers, the Nicolaitans, the Donatist, the Lutherans the Calvinists and the Evangelicals in our day, it is very possible that John was referring to another false apostle in his day and very possible he was referring to the same movement.