I have one policy for two sensors. I just updated it. When I click on the Snort Sensors line, they both show as Status: "Updated" in the right-hand pane.
When you select "Upload Policies to Sensors", they show as "Sensor needs to be Updated".
It would be clearer (to me) if the Snort Sensors Status showed as "Needs Updated" instead of "Updated".
"Current" and "Updated" seem synonomous to me.
Ray