sola Scriptura in no way designates Scripture as the only authority to be obeyed (as opposed to only infallible rule). More basically, sola Scriptura is a framework for the church as such, not for Christians in the apostolic age sitting under the teaching of living apostles, during the era in which Scripture was still being written. When passages like 2 Thessalonians 2:15 are set at odds with sola Scriptura, this simply reflects that the doctrine has been misunderstood.
