As far as I know, there is no option to set the time interval at all, it's not in the car manual also. I've checked the settings, and nothing is there for us to control the time interval for it to update.
Holding down the reset button on the dash is almost the same as holding down the SEL/RESET button on the steering wheel, it just resets trip A (if you are currently Trip A) or trip B (if you are currently on Trip B). Only thing I can think of is to reset the ECU? or pray that there is some kind of fix for this. I dunno, maybe I'll leave it for Honda to do when I go in for a 10,000km service.
What does yours show when you go on a freeway for more than an 1hr+?
