Thank you both.

I had indeed fiddled with the scaling on import. 

I also noticed when I went throught the  "Do it again, you fool, and get it right this time"  routine that in export the 'morph target-no world transformations' box was unchecked. Checked it, went through everything again and it worked properly.
I had set the other morph to zero before, to see what the original looked like. It did not occur to me that I might be altering already altered geometry. Will remember the point in future.

"While you're here......."  (dreaded words in my job)  
is it right that the Morphing Tool only works on one part at a time? 
Is there a way to alter an area that overlaps 2 parts or groups? 
How do you select 1 vertex and move it without it jumping all over the place or moving itself to a different vertex and moving that even though all the surrounding vertices were Pinned? (is this a mouse problem; is it just my hands shake....)