We have found out that there is a difference between Time spent on page - bucketed and Time spent on page - granular. The bucketed takes into account only the pages, the granular also takes into account the link events. In our interpretation the "time spent on page" should take into account the link events. That means that we can only use the "granular" definition, but the data we receive is almost useless, because almost every page has a different time spent on page, and it becomes impossible to make conclusions of those data.
So we would like to have a dimension "Time spent on page - Bucketed" taking into account the link event (as it is or the granular definition now).