Tasks - End dates set to 2011?

Tasks - End dates set to 2011?

Hello,

I am having another problem with tasks:  I am taking a web-based class and I have a number of chapter tests to hand-in.  To keep me on track, I have created 17 tasks for the 17 chapters, each with an end date between January and May of this year.  I looked at my task list yesterday and found that the end dates were now skewed, as they are now spread over 2010 and 2011 as well.  This happened very recently, although I cannot pinpoint the exact time.  I will reset the end dates, but just wanted to let you know.