The only explanation I could think of is this: 2.34 is the average time spent for this prop value, by 584,965 visits.When you correlate the prop with "Time Spent per Visit - Bucketed" which is a dimension, you are asking Adobe which values of "Time Spent per Visit - Bucketed" and "Prop8's this value" were seen together, and what was the Average time spent per visit for these values seen together. The Bucketed values are not "bucketing" the 2.34 of the prop's value, they simply letting you know w...

From implementation: Adobe only uses cookies to store and create Unique Visitor IDs. Sessions or Visits are calculated in processing by time of hit, because of this no session or visit id is available, atleast not on user's browser to capture in a variable. In reporting: you have "Visit Number" available as a metric, you can create a table with Visitor IDs broken by Visit Number to get the same result. To capture the Visitor ID you can use visitor.getMarketingCloudVisitorID() or use the Unique V...