In the first prophecy, Ahijah tore his new cloak into twelve pieces and gave ten to Jeroboam with the statement that God would give ten tribes to Jeroboam to rule; with the condition that Jeroboam was to remain obedient to God.
In the second prophecy, because Jeroboam turned his back on God, disaster would fall on the house and family of Jeroboam. [Reflection based on the Bible Reference – 1 Kings 11:29-38 and 1 Kings 14:7-16]