Paul's shopping lists not infalible

The “prophets and apostles may have written some things in the ordinary way to private persons, as, for instance David sent private letters to Joab. These things ought not to be received into the canon. But whatever they wrote as prophets, and inspired by God, for the public instruction of the church, have been received into the canon. ” (William Whitaker, Disputation on Holy Scripture, p300-1)