Just seems like some Important instructions is missing on how to achieve this.  But my initial thought was, what AgentSmith said.... Select the version of the sails you dont want to render and delete it.

Have you tried Deleting Sail1_1 doing a render and see how it looks? and than Deleteing Sail2_1 and rendering and seeing how that looks? and Finaly Deleting Sail4_1 and seeing what that looks like?

And Finaly maybe you need to CTRL+Click the Sails you want to delete and see what it selects.

I'm Just throwing some ideas.