I figure it would help to know the gap between when they last refreshed their thralls. The time was reduced from 20 days to 10. And they made the OP 9 days after the change took place.
If they hadn’t logged in since… say 9 days before the announcement (total of 18 days). You would think they would have 2 days left. But the system has always been finicky when you change the timer settings.
If reducing the timer cuts all timers by the same amount and applies the consequences, that would be good to know for a bug report.
In either case, when a change is announced, it might behoove someone to login the day before just to make sure. And there was like 12 weeks of notice of when the timers would be reverted: