Sub Articulo 111.1

You probably need to write something like (note the blank lines):
... bla bla bla.
\begin{figure}[bt]
...
\end{figure}
\noindent % if you want the next paragraph to be flush left, otherwise
ignore this line.
bla bla ...
Alternatively, if you really need the figure environment and text to b
 e the
way you already have it, try (note the "%" after \end{figure}):
... bla bla.
\begin{figure}[bt]
...
\end{figure}%
bla bla ...