SSRS 2005 Report Builder - adhoc report is displaying less records than the total records retrieved as per filters

Hi All,

I am having problem of getting less row display than the number of records retrieved.

I am getting following output:

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CODEDATE_DCLASSvalue

82212012/12/20C6

82212012/12/21C4

82212012/12/22Y34

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whether the first and second records are having one more record. (Report total records retrived are coming as "5")

And its displaying the correct number of records when i place column 3

(Class) at first place.

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CLASSCODEDATE_Dvalue

C82212012/12/206

82212012/12/214

Y82212012/12/2149

82212012/12/2234

82212012/12/2075

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Please help me on this.

Thanks in Advance,

Regards,

Kumud Vaish