No it's not a typo. I have cylinder 1 and 5 misfire codes, confirmed by shutting off injectors with SDS. You are correct coil pairing is 1-6, 2-5 and 3-4.

My knee jerk reaction was to replace injectors, which at 135,000 miles probably not a bad idea regardless. I still have 1 and 5 misfire with new injectors so I ordered 3 new coils and 6 spark plugs. Wires look new but given what I learned here this will probably turn out to be bad #1 and #5 wires/ boots.

I also found some oil on spark plugs/ boots… mostly 1 and 5… which surly must be coming from spark plug hole seals under valve cover.

As much as I hate just throwing money/ parts at the problem… in this case, given the age and milage I don't feel too bad about it.