Updated December 6th, 2016
This article describes the behaviour when two different WPM locations have differing playback times for the same transaction.
Having multiple locations is allowed for monitoring from separate discrete locations. It is expected the playback times of one Transaction would have different playback times when monitored from different locations.
Review each Transaction and identify the steps which differ in playback times.
In the WPM Web Console browse to the steps and review the TCP Waterfall charts. These charts will visually display a breakdown of the step's behaviour which can be compared across the locations. The difference in the charts will indicate the cause of the difference between the same Transaction in the different locations.