Geometric Network Errors

I was working on my Geometric Network tonight. It was interesting and shows a lot of potential, but I didn't get too far. I was applying attributes to points on the network, sinks and sources, and establishing direction of flow. I had problems when I got to doing more complex areas, such as the branching sewer lines where there would be multiple sources.

I also explored the errors which were occurred when I created the Geometric Network. Below is the map with the error points noted.