Baasha and Asa

1 Kings 15:33 - In the third year of Asa king of Judah began Baasha the son of Ahijah to reign over all Israel in Tirzah, twenty and four years.
2 Chronicles 16:1 - In the six and thirtieth year of the reign of Asa Baasha king of Israel came up against Judah, and built Ramah, to the intent that he might let none go out or come in to Asa king of Judah.

Scholars seem to use the explanation that the 36th year is really starting at the division, but that would mean the treaty with Aram took place around the 15th year...during the great covenant celebration?? The chapter before clarifies that the covenant took place in the 15th year and they were blessed with peace until the 35th year. How could it be using the dating from the beginning of Asa's kingdom in one sentence v. 10, then using the dating from the division just a few sentences later, in the same story? v. 19 And it doesn't make sense that this dating is not used anywhere else.