Remember that 2 links can't connect directly together...there must be a node at the end of a link. So if there was a complex edge and a 'side' link connected to it, then schematics splits that edge so that the net junction nodes are available to connect the 'side' link. You can run a Node Reduction Rule to get rid of net junctions, just be aware of the side effects. For example, when I use the node reduction rule I normally specify to only remove nodes with 0 or 2 connections. That means get rid of a node if it is an 'orphan' (no connections) or if it is just in the middle of 2 links and has no other connections. Getting rid of 1 connection or > 2 connections is where you have to be careful as the outcome may not be what you want. If you get rid of the 1 connection (node is at the end of a link with no other connections), you will also end up losing the link (as mentioned above a link can't exist without 2 end nodes). If you get rid of > 2 connections, then the connectivity has to be re-calculated and it may not come out exactly the way you think it should. If your network has proper flow in it (i.e. you can trace upstream and downstream), then you can also look at our Node Reduction By Flow Rule which helps with the > 2 case.