Google +one button - help needed

[seoug_2005]

I have installed Google plus button on my homepage.

My GA report is being displayed like this -

---

7 total events were recorded

Total Events              Unique Events

7                                    2

Event action                    Total Events

on                                           4

off                                          3

My questions are -

1 ) Is someone clicking on Google plus button considered an Event ?

2 )  What is meant by 2 Unique Events

3 ) Why does GA report shows   on  4 and  off  3

[KeriMorgret]

Admin note: answered in http://www.seomoz.org/q/google-one-button-help-needed-3