You appear to be correct. I looked at the molecular structure of sarin and I can't see how sodium cyanide NaCN would come into play. The articles were written by journalists and not chemists so all chemical agents are probably the same thing to them.
I did see that sodium cyanide is used to make the nerve agent called 'tabun' and that Iraq had produced tabun before.
Yes, I think they were just combining nasty terms.