1)
Here it says that that they buried Achazyahu in Yerushalayim. In Divrei ha'Yamim II, 22:9 it says that they brought him to Yehu, and they killed him, and buried him [there], "for he is Ben Yehoshafat." Surely Yehu was not in Yerushalayim!
1.
Radak (27): They killed him in Yizre'el, and they let Achazyahu's servants take him to Yerushalayim to bury him there.