[O] org file opened in latex mode when ending file w/ latex emacs signature

[Giacomo M]

Dear all,

I tried to put at the end of an org document
* eof :ignore:
#+BEGIN_LaTeX
%%% Local Variables:
%%% mode: latex
%%% TeX-master: t
%%% End:
#+END_LaTeX

to have it at the end of the latex export so that if I open the tex 
(e.g. for debugging) I can compile it directly (w/o the question on who 
is the master).

Oddly, when doing so, the org file is not anymore opened in org mode but 
in latex mode instead.

Why is that? Is it an expected behavior?

Thanks,

Giacomo