Matthew Henry Commentary 2 Kings 3:1-5

"Now Jehoram the son of Ahab began to reign over Israel in Samaria in the eighteenth year of Jehoshaphat king of Judah, and reigned twelve years. And he did that which was evil in the sight of Jehovah, but not like his father, and like his mother; for he put away the pillar of Baal that his father had made. Nevertheless he cleaved unto the sins of Jeroboam the son of Nebat, wherewith he made Israel to sin; he departed not therefrom. Now Mesha king of Moab was a sheep-master; and he rendered unto the king of Israel the wool of a hundred thousand lambs, and of a hundred thousand rams. But it came to pass, when Ahab was dead, that the king of Moab rebelled against the king of Israel." — 2 Kings 3:1-5 (ASV)

Jehoram took warning from God's judgment and put away the image of Baal, yet he maintained the worship of the calves. Those do not truly repent or reform who only part with the sins that cause them loss, but continue to love the sins from which they think they will gain.