Inconsistent statistics

[guusdk]

The graphs as generated by the plugin appear to be incorrect. Look at these two graphs below, taken at roughly the same time. How can the 'high' value from the last 7 days be lower than the 'high' value from the last 24 hours? Those periods should overlap, so the highest value from the last 7 days should at least be equal to the highest value of the last 24 hours.