I'm trying to program some stuff of my own and 

either I misunderstand the documentation or something is wrong

with  #'org-get-tags-at.

I have a heading:

* Bar                   :foo:bar:baz:

(org-get-tags-at)

while on the heading returns ("baz")

I would expect ("foo" "bar" "baz")

What is the reason for tat result?

Regards,

Fabrice