Navigation problem

On ServersCheck 7.5.5, when I go to the device view, or to the group view and then click on the rules icon, I see a list of devices (as it should be). But then, when I click on a device (expecting to see the rules for that device), it shows me all the rules for all the devices.



It does show the properties and graphs for the device, but lists all rules for all devices.

Never mind... there was a "blank" device (device with no name) showing up on one of the views. I deleted it and the navigation is OK now.