more than 10 day in troubleshoot report

Hello !

We use your free version "Netflow Analyzer Professional 5, 5.5, 6" and have found the following bug :

while generating a report in "Troubleshoot" mode for a long period of statistics (for example longer than 10 days)
several data records are missed. Please, see attached examples :

1.jpg - the report for a period of 10 days, complete set of data can be viewed successfully
2.jpg - the report for a period of 11 days, the data are missed
3.jpg - the report for a period of 2 days, proving the presense of statistics in fact for the days of "2.jpg"-report

Would You comment this situation and possibly suggest some workaround for it ?

And how to do more than 30 day raw data storing?