This has always bugged me because Genesis 49:13 and Deuteronomy 33:18-19 being by the Seashore and a Heaven for Ships and possibly being merchant traders.
According to the Midrash the banner of the Tribe of Zebulun was a Ship on a white background. And there are other Rabbinic traditions about them being sea farers.
Josephus in Antiquities of The Jews Book 5 Chapter 1 Section 22 says that Zebulun's allotment includes Mount Carmel, which on these common maps is given to Manasseh. However Josephus's credibility is hindered her by claiming Zebulun also bordered the Sea of Galilee when in Joshua that's all Naphtali. The Assyrian King Tiglath-Pileser carried away the entire tribe of Naphtali into captivity but Zebulun is not including in any of the Assyrian captivity accounts. So I think after that happened Zebulun sorta claims Naphtali's former territory which I think explains this mistake of Josephus any any time you see Zebulun associated with the Sea of Galilee.
There are two placed called Carmel in The Bible, there is a Carmel south of Hebron in the Judean Mountains. But "Mount Carmel" always refers to a ridge of Mountains in Northern Israel in the Haifa subdistrict of the Haifa district.
The city of Jokneam is part of that ridge. Joshua 19:10-11 and 21:34 clearly define Jokneam as part of Zebulun, but it's given to Manasseh in all these maps I've talking about.
The confusion is caused by the account of Manasseh's allotment in Joshua 17, it mentions the tribe of Asher in three verses, 7, 10 and 11 and Zebulun not at all. The first two verses seem to say Manasseh border Asher, and then verse 11 talks about cities in territory originally meant for Issachar and Asher that Manasseh wound up claiming, but the Canaanites were not driven from those cities anyway. Dor is typically assumed, including by me in the past, but the one was Asher since other reference to this group don't include Dor and the other are right by Issachar. Since none of these are mentioned in the actual accounts of those Tribes allotment sin Joshua 19 we can't say for certain.
I have to admit, if I weren't doctrinally devoted to a belief that the Hebrew Text has been perfectly preserved, I would be inclined to theorize that all three references to Asher in this chapter were supposed to be Zebulun. It is usually Zebulun that gets paired with Issachar like this. The Septuagint and Peshitta are variant here but never in ways that add Zebulun. Neither mention Asher in verse 7, the Septuagint says Aseb in verse 10 but does say Asher in verse 11, the Peshitta has Asher in verse 10 but not in verse 11.
Instead what I'm going to speculate is that Asher's claim on Dor did not require land continuity with the rest of Asher allotment since Dor was a port city and Asher's actual allotment was also on the coast.
In this reinterpretation of the Tribal Borders the land of Zebulun includes the port city of Haifa. This city is never mentioned in The Bible, but it is ancient being even a port already in the Bronze Age, but young enough to have not existed yet in the time of Joshua.
