I have several examples of tickets last edited (per "Updated" field and in the tickets' History) two days ago, yet the "Time Since Update" fields shows about 15 hours since the last update. Why the discrepancy?
Note WHD and server system times are synched to the same time and time zone.
Found that WHD uses your office hours to adjust the Time Since Update data. Removed that setting since we're a 24/7 shop and the two fields now agree.