Jesus calmly points out to the Pharisees that doing good on the Sabbath is acceptable, and that doing what is necessary is also within the bounds of His commands. After all, He is the Lord, even on the Sabbath! (Luke 6:5)
In Nerdiness: Compare your lists of Apostles: Matthew 10:2-4; Mark 3:16-19; Acts 1:13; Luke 6:14-16.
Before these are dismissed as errors or disagreements, look at the cultural concepts of name lists. Most difficulties resolve themselves.