The digital reading log is a feature that is reserved for Whooo's Reading School licenses.
If you enter an incorrect number of minutes or pages when logging reading, you can edit it on your reading calendar. Click My Shelf and then Reading:
Scroll down to see the list of all months with logged reading, and click on the month that has the reading log you want to edit:
Click the Edit link next to the reading log you want to edit:
Change the minutes and/or pages to be the correct amount, and then click Save:
To delete the log completely, change the minutes and the pages to zero and click Save.