I think I may be inadvertently to blame for that anomaly.
I notice that my recent review of Telus is now listed at the top of the most recent list, but when I originally posted it a month and a half ago it was recorded as an update to an antique review of the old Telus ADSL service that I posted more than 8 years ago. It did not appear in the Recent Reviews list at all. I complained in the dslreports Feedback forum that there was no way for me to post a new review, and suggested that reviews updated after more than a year should appear as new reviews (see »
Reviews updated after a year or more should show up as New). I guess they took my suggestion, and changed a whole bunch at once so they all appeared on the same day.