Any time you make any change/update to a cost. The purchase date changes to the previous day.
For example, if you have a purchase date set to 28FEB2024, and you change the cost (say adding or removing a site) after saving, the purchase date will be set to 27FEB2024. Make another change, and it’ll roll to 26FEB2024.
So I confirmed it, and was going to record a video for you… and then Dashboard v5.0.1 was released and I updated it. Now it works haha. Something in 5.0.1 must have fixed it.