Stats Count not returning expected Results - Difference in count over single date and span covering same date

[insaneteddie]

HI Guys,

Just noticed something a little strange,
I am running a query to cont the number of a certain transaction.
When I run this query for a set date say the 23rd of June, it returns about 5.5k results.
Yet if I run the query with a time chart over the span of 1 month, It returns double the results in the count.
When I click into the events from this search it shows the original number as returned by the search of just that day.

Would someone be able to answer why this occurs?
Search query for the single day is:

host=myComputer-* index=index "KeyPhrase" success=True NOT (Content=Test1 OR Content=Test2) Crm=myRequest|stats count

and for the monthly one I run:

host=myComputer-* index=index "KeyPhrase" success=True NOT (Content=Test1 OR Content=Test2) Crm=myRequest|timechart count

any help appreciated.
Thanks
Steve