I am 100% certain that was your reasoning the last time this issue came up. I don't accept it as true because it's not supported by the text.
2 Kings 8: [SUP]25 [/SUP]In the twelfth year of Joram the son of Ahab king of Israel did Ahaziah the son of Jehoram king of Judah begin to reign.
[SUP]26 [/SUP]Two and twenty years old was Ahaziah when he began to reign; and he reigned one year in Jerusalem. And his mother's name was Athaliah, the daughter of Omri king of Israel.
2 Chronicles 22: 1 And the inhabitants of Jerusalem made Ahaziah his youngest son king in his stead: for the band of men that came with the Arabians to the camp had slain all the eldest. So Ahaziah the son of Jehoram king of Judah reigned.
[SUP]2 [/SUP]Forty and two years old was Ahaziah when he began to reign, and he reigned one year in Jerusalem. His mother's name also was Athaliah the daughter of Omri.
It's the same person. The details make it irrefutable. Kings says he was 22, Chronicles says 42.
It's a contradiction, clear and plain, with no room for weaseling, wiggling, or convolutions.