2004 3600 Sovran only pulling fuel from the starboard tank

[JonAFL]

I just purchased a 2004 3600 Sovran.  When I got the boat both tanks were showing full on the gauges. I’ve been running it for about a week or so and ran the starboard tank to about half. I thought maybe the fuel gauge was not working on the port side. I went to fill up today and the port tank is still full. It looks like both engines are only pulling fuel from the starboard tank. When I look in the transom it looks like all of the fuel valves are open in the same position. Anybody have any ideas could my valves just not be in the correct position or is there a recommended fix.