User blog comment:Dabrain930/Frustrated/@comment-5278765-20131127010511

Yeah, the days on there don't match up with 12:00 AM-11:59 PM days. I'm not sure where you live, but where I live, the new "day" starts somewhere around 7:30 PM from what I've been able to tell. So you may have contributed before that new day start time on one day and then not again until more than 24 hours later, even if it was on the next date.