I make no attempt sort out what your particular problem is.

But 3 loss terms can exist.

If rho1 occurs between generator and line and rho2 occurs between line and
load, and rho3 occurs between generator and load before the line is
inserted.

Then -

Log(rho1) + Log(rho2) - Log(rho3)

Or something like that. If this doesn't ring any bells then forget it.