I thought it was the lone pinnacle that preceed the plateau of the castillo on the north ?
It's the western summit (N.W. is most exactly). This peak appears in all the maps of Ordesa with name (even in the map of your page of SP). It's not a main summit but the views of the main (Castillo Mayor) is very exciting. It's very advisable to reach this summit in the descent to the main summit.
my map is unclear indeed...
and mentionned about your route on the map. if you want to add any further details you're welcome !
it's o.k. for me