Purchased a pre-owned 2015 Honday Odyssey from a dealership about 2 weeks ago. I've now noticed that the trip history seems inconsistent with odometer which is at approx 28110 mi. Trip history shows 15497, 9999.9 and 12374 which add up to 37870. What can explain this? We were given a carfax report with over 20 history records and the odometer seems to agree with that.

Any help? Can a honda service center tell me if the odometer was rolled back?