“and Mearah that belongs to the Sidonians.” Sidon is in the north of Israel; Mearah is unlocated, but would be somewhere between Tyre and Sidon.
“to Aphek.” The Hebrew word “aphek” means “source, spring,” so there is more than one site called Aphek (cp. 1 Sam. 29:1). This is likely the Aphek up north, just south of Acco. The Amorites did have a northern presence. North of the Amorites at this time could even be the Hittites.