I struggled with this for a while, being the first time I ever played with it. It seemed both intuitive and reasonable to me that the "target" actually include the object (stack) reference, and not just the name of the stack. It was only because I am used to screwing around in this way that I tried the name alone, not expecting it to work at all.
A side note, what is going on with the dictionary notes? They are as ephemeral as the "sample stacks".
They are only intermittently available. That is, they are almost always not.
I check now and then for the entries where I placed notes, so I can see if they are listed. Once in a while I can see them. I think they are invaluable, for just the above sort of issues, never mind helpful twists or cautions.