Looks fine to me, after importing it from the attachemnt I rearranged nested sub process nodes to fit into the subprocess nicely and that order was preserved over reopening of that file
https://community.jboss.org/servlet/JiveServlet/downloadImage/2-752040-19149/450-239/editor.png
Maybe it's worth upgrading your drools plugin to the latest one, it could be indeed a bug that is already fixed.
HTH
