Contradiction with Proverbs 16:33
Acts 1:23 involves a human decision-making process involving two selected individuals, whereas Proverbs 16:33 emphasizes reliance on divine decision.
Proverbs 16:33: The lot is cast into the lap; but the whole disposing thereof [is] of the LORD.
Contradiction with Acts 1:24-25
Acts 1:23 narrates the nomination of candidates by human choice, while the following verses attribute the ultimate selection to divine intervention through prayer.
Acts 1:24-25: And they prayed, and said, Thou, Lord, which knowest the hearts of all [men], shew whether of these two thou hast chosen,