Tendo treasure is one thing, Sage treasure is another.

I have yet to see someone duplicate Sage-Oro-Ao yet on my server, it has always been in one order or another. After that it is probably duplicate, but unsure, nobody on server has Sasori yet.

I went Sage Naruto -> Ochi -> Ao
Another went Ochi -> Sage -> Ao
Another went Ochi - Ao -> Sage

Small sample size, but I am more likely inclined to think Sage Treasure won't duplicate early. Tendo however, duplicates all the time.