Reminder and Notifications

I set up reminder for 20000km or one year. I drove 20000km in 7 months but progress bar still shows about 75%. In my opinion it should be configurable ( glued to odometer, date or whatever comes first). The same thing with repeating for future periods. I'd like to be notified when odometer will be close to next 20000km (or year if it becomes earlier, counting from date when next period was triggered).