Clefs just determine the positioning of the diatonic names on a single staff, and don't affect the other. They determine the position of a single a diatonic name, and the rest of the positions for just that staff are affected relative to that.
So the treble clef, a "G" clef, determines that the second line is a "G", which will make:
The first/bottom line an E.
The first top ledger an A.
The first bottom ledger a C.
The bass clef, an "F" clef: determines the that the fourth line on the staff is an F, thus:
The fifth/top line an A.
The first top ledger a C.
The first bottom ledger an E.
Two treble clefs and two bass clefs don't line up like the grand staff with treble and bass, so the ledger lines, which I believe you are referring to don't line up the same in the middle.
Ledger lines (including middle C in the traditional treble-bass grand staff) are extensions of a single staff, and don't belong to both staffs. Middle c just happens to line up perfectly in the grand staff case.
Topic: double clefs