SalesIQ time on site is wrong!?

SalesIQ time on site is wrong!?

We use SalesIQ to make statistics bout how long users spend on our site. However we have noticed that even if a user just enters a page and closes the page right after, SalesIQ keeps it alive for more than a minute and reports back that time on page is 1min and 5-10 sec. It is off with more than a minute !?? It is important for us to know if Adwords users just bounce off the page right away. What is wrong? Google Analytics also tells another story about the bounce rate!?