Expiration dates shortened

The expiration dates for my library ebooks are being shortened by a week by version 2 of Adobe Digiital Editions. ie.  I check it out for 2 weeks and it changes to 1 as soon as it downloads into Digital Editions. This didn't happen with the previous version.  I am using 2 different libraries and 2 different computers.  One computer runs on Windows 7 and the other on windows XP. Anyone else having this problem? Ideas how to fix it? The dates on my computers are correct.