Steps to reproduce:
- Create a graph of items being monitored on a host.
- Change the "Draw Style" to anything other than "Line"
- Press the Add button to add the graph.
- Go back in and edit the graph and the "Draw Style" will be line.
- The graph items are always line and display as line when viewing graphs.
- If you select the preview tab, it previews correctly, but always saves as line.
See attached screenshot...