Apostles are NOT infallible:

• Galatians 2:11-15 shows us how Peter was in the wrong and Paul had to correct him.  This also shows that each apostle is under the government of all the other apostles.  God left no person who does not have to submit to others.
• James 3:2 tells us that apostles make mistakes.  Though they have responsibility to rule over the entire church and to receive revelation and doctrine for the entire church, yet, they can make mistakes.  This is why apostles make every effort to only teach the apostle's doctrine, that doctrine which has been revealed to all the brethren.