I also do not think an artist's rendering depicts Church dogma or teaching - unless of course it is done by commission for the Church, according to it's specification and approved by it's authority.
All that we know of this is the image itself and the photographer's description: "Mary's Sacrifice, Granada, Nicaragua."
He doesn't appear to have any motive other than to make money from prints, so I deduce his description is sincerely written.
Then again it's entirely possible that the cross was once upright and fell during the wars there during the 1980s and the people in charge of the cemetery decided to leave it the way it came to rest.