I’m in MA, so it might be a little different. But “transmission” is typically from the power generation station to the substation (the definition of “transmission” in power systems). “Distribution” is typically from substation to your house. So they might sound the same, but they are for different things.

Its sort of confusing that they separate your charges into different fees like that, but I’m assuming the transparency in fee structure has to do with it being a regulated utility.