I see what you mean - in the old "dropbox" you used to be able to change the customfield title when you added it to a product.
This had the benefit of allowing the customfield title to be modified and be different to that of the "master" customfield
I had an issue with this - because when/if I wanted to change the "master" customfield title I then had to go and change the (potentially) hundreds of product customfields of that type.
The behaviour I wanted was to be that the customfield title reflected the setting of the master customfield title.
Therefore I changed the plugin such that it no longer stores a title at a the product level - and uses the "master" customfield title in product displays
You can continue using the old dropbox version if you require that behaviour.
But the new qvariant customfield version behaves as shown on page 1 and as described above.