Contradiction with Philippians 2:25-26
Contradicts 1 Corinthians 16:12 by showing that a fellow worker (Epaphroditus) was sent to the Philippians willingly for their needs, whereas Apollos was not willing to go to Corinth with the brethren at that time.
Philippians 2:25-26: Yet I supposed it necessary to send to you Epaphroditus, my brother, and companion in labour, and fellowsoldier, but your messenger, and he that ministered to my wants.