Why does safesite logo look different on different computers?

I did the online product upgrade on one system about 3 months ago and the safesite icon in the search results is a green circle with a check mark inside it. Today I did the online product upgrade on the other system and used the key from a retail copy to renew subscription(also used on the first system). The safesite logo on this one is a green circle with ‘ok’ inside. Some sites also show 'secured by Norton" before the green circle. Why are these different. If there was an update since the first system upgrade, why wasn’t it updated with liveupdate? Thanks, BGC