Inconsistent output?

Inconsistent output?

Hello,

I have been trying this NetFlow Analyzer & I found it a pretty cool tool , really helpful in analyzing traffic.
However, I would like to know why the displayed historical info is not consistent. I have saved the page for conversation within a time stamp. but then when I run the analyzer again (say the next day) for the same time stamp (and same date or course), it gave different value (traffic) and different users (as top talkers). May I know why is that so? Please kindly share. TQ.


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