I wonder if anyone else has had this query.

Because I have been covering around 33,000 miles a year for the last 20 years I've always run my Skoda diesels on the 2 year / 20,000 miles service regime. With this the mileage would always come first, so I was used to getting the message 1800 miles to service. Now I've retired I'm not doing the big mileage, so I was not surprised to get a 'oil service in 28 days' message yesterday. 

The problem I have is the last service was in May 2023 and I've only covered 16,000 miles, so 4,000 or 6 months short?

What has it been counting down since it was serviced and the technician reset the indicator for 20,000 miles or 24 months?     Flexible / variable Is 18,000-20,000 actually.       Had the Tech or Fitter left the car with Inspection Service and oil Service showing at different amount of days?  Ie not reset it properly.