Virtual Bassist Save Part BUG?

On Page 42 of the manual say you can copy and paste a part to multiple keys “and edit them individually in the Macro and save for variation” (You can assign the same Part to several keys! This allows you to have
variations of the same groove on multiple keys.)…
But when I try to save an edited part (say Basic 1 on multiple keys), all the other keys with Basic 1 CHANGES to the newly edited part…
How am I suppose to get variation on a groove if ALL the groove (part) keeps changing after I have edited just one groove (part)…
I would like to believe that I am doing something wrong… Seem like it’s an important feature that was advertised… Don’t tell me it’s a bug…please.