For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures, that he was buried, that he was raised on the third day according to the Scriptures, and that he appeared to Peter, and then to the Twelve. After that, he appeared to more than five hundred of the brothers at the same time, most of whom are still living, though some have fallen asleep. Then he appeared to James, then to all the apostles, and last of all he appeared to me also, as to one abnormally born.
First Paul wasn't there. Second reading "and that he appeared to Peter, and then to the Twelve." Peter and the Twelve? That makes 13! I have never heard of 13 original Apostles! His numbering is off. But according to Matthew, who is an eyewitness (unlike Paul), there were only 11 (the Twelve minus Judas Iscariot). So, why do you believe Paul (not an eyewitness) over Matthew (an eyewitness)?