Can humans have two higher-selves

Yes, that’s possible, so any thing that has life has a higher self, defined by the physical construct, so a tree has a higher self as its alive, any thing that lives has a higher self.

The local mind, when death occurs the experiencer understands that according to the local minds construct, and so when people passover they experience it from previous memories of life.

Without a higher self, there is no life.

It can be said hybrids have two souls, combined for existence and upon separation each soul returns to its specific point of origin, they disengage from their symbiotic relationship, this is why the gateway has also been created to allow the capacity of the entity to bring that human information into their own races.

If a physical form is animated, it has a higher self.
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The human mind, the local construct holds multidimensionality this is also a function of higher self. We learn from facets of ourselves as teachers.