Testing epee body cords

Testing epee body cords. When I connect the C-line to the terminal the C-line gauge is activated. But when I connect the C-line to the A-line terminal, the A-line gauge ALSO is activated (not at the same time, but testing one line at a time). Are the body cords wires flipped? I always thought that only 1 line should activate per wire. Or is this expected?