Data disappeared unnecessarily in excel pivot rows

Hi,

I have  an Excel 2010 report based on SharePoint 2010 list. I have generated a pivot table from the source data in another sheet (same workbook link with SharePoint list). I found some peculiarities in my pivot table like-

• Some fields values are not appearing on cell in some random rows where they are present in source.
• If I double click on the disappeared cell the data comes but some available data are disappeared in another cell in another row at same time and it happens randomly.
• Sometimes a whole row is disappeared when I double click on any unnecessarily disappeared data.

Could someone please fix it? 

Thanks in advance.