I just received a note from Justin about this plugin. He informed me it was written for Sib4. When using it with Sib 6 I get the above mentioned problem. A workaround is to place the last hairpin in the bar , then run plugin.(data is written ) THEN , place the 1st haipin and run plugin again. It will then write data for the 1st leaving the 2nd alone. Done.
I'm slightly confused as Justin specified Sibelius 5 and above. And yet his note said he wrote it for Sib 4. Never mind. It works. Thanks.