The visualization in Explore is only showing 38 nodes, but I have 236 of them. I have two types of node (coming out of a SQL join table structure that I tried to convert to Neo4j), and both of them are selected in the Presentation. It comes up with the same result whether I use the Default presentation or create one from scratch. Not all of the nodes are connected with relationships, but I believe more of them are connected than Explore is displaying.