wrote

Yup, on Lycoming. Continental, at least on the smaller engines,
will have the right mag firing the top plugs and the left firing the
bottom. The impulse mag (right) fires the top plugs, since they're
less likely to get wet with oil or fuel.

I think you mis-interpreted his comments. He said (at least I think he
said) that one mag fires the top plugs on the left cylinders and the same
mag fires the bottom plugs on the right side cylinders.
--
Jim in NC