Interactive Insights Date Range Output

Hi Expert Team

I have an issue and was hoping you could provide some guidance as I have never come across the below issue before.

When drawing an historical report for example for the month of September 2020 I am also data for previous years (2017/2018) in the reports even though I never specified that far back.

Do you have any idea what could be causing this.

Any feedback would be appreciated.

Thanks again,
Wayne