Name: greene Savannah, GA (Sunset 28) (Zone 8b) I have no use for internet bullies!
Am I reading correctly...six years old? Do you have any photos of the blooms taken in those years? Maybe I am too cautious but I don't suppose you could wait for next year when the new growth appears and the flowers bloom. That would be a better way to be sure what plant you have.
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"