[Orgmode] footnote: org >> latex

[Eraldo Helal]

Org-mode source file:
> - OSD[fn:OSD]
> - OSD[fn:OSD]
...
>[fn:OSD] OSD: "open source definition"


Resulting PDF:
> • OSD¹
> • OSD$^1$
...
>---------------------------
> ¹OSD: "open source de nition"

What I want is to be able to have multiple footnotes leading to the
same reference.
I tried to do footnotes with different syntaxes but I could not manage
to get it.

Example:
Open source is defined by the OSD¹.
The OSD¹ definition is written in the form of guidelines.
The GPL² plays an important role talking about licensing.

----
¹ OSD: "open source definition"
² GPL: "General Public License"

Am I using the wrong syntax or is it a bug?
Any idea how to fix it?

Greetings from Austria,
Eraldo