I learned the hard way that “Renew All” meant that a book I took out yesterday is renewed, not for an added three weeks, but for one day! Ugh! How about explaining that under “Renew”?
Your frustration is understandable. At this point, the details about renewing online are described in the FAQs:
When you renew an item, the new due date is calculated from the date you perform the renewal. The additional time is NOT added on to the end of the original loan period…To get the maximum time on your loan, you should perform any renewals very close to the due date.
I will pass your message on to the staff at the Minuteman Library Network Central Site staff, who may be able to make this more clear up front.