DS3231.h --- Library for DS3231 (or DS3232) real-time clock

jhub:
http://soiling-detector.googlecode.com/files/DS3231updated.zip

I set my clock with the example in the zip, and when I run the example test for some reason one time is exactly 6 hours off of the other. The logs look like:

2012 2 17 5 19 30 25 24h T=20.00 O+
Alarm 1: 5 DoW 19 22 30 enabled
Alarm 2: 17 Date 19 23 enabled
12/2/17day of the week :5
13:30:26

Any ideas where I can look for the bug? Or ideas what it may be?