Hi, Pat.

I don't have any great solution for you here.

If you have to turn of stateful packet inspection (SPI) on your router to make PingPlotter work, then that may have to be a compromise that you have to make in your router configuration. Maybe Netgear has some advice for you on ways you can leave SPI *on* and still have PingPlotter work. You may also want to check for the latest firmware update for your router, since that's one thing we often find helps - when the manufacturer finds a problem. Unfortunately, we don't have a WNR3500 inhouse to troubleshoot for you.

As for the packet loss numbers not totaling in the graph: It looks like packet loss stopped at 10:03.45 - maybe that's when you turned of SPI? The upper graph is showing 380 samples, and which includes the period where you were losing packets and also the period where the packet loss stopped (in the lower graph), so it's summarizing both time periods.