Excel 2007 : Chart - Y Axis won't display both rows of data

Hi, I am working on a pivot chart, and for whatever reason, on the Y axis, it will not display both rows of my data. For example:

on my Y axis:


15 min. period 15 min. period 15 min. period 15 min. period
2/13/2011 2/14/2011 <should be date> 2/16/2011

It's kind of hard to explain - I have uploaded an attachment. Could someone please help me out?

Thank you very much!

The attachment did not make it. Can you try again? If the file is large, remove all but a few sample rows of data and zip the file.

cheers,