potential bug reports?

I am using Sugar Pro 9.0.2 onSite.

I built a Matrix report on Leads with date created and status parameters. Date Created is set to a range: 1 Jan 2017 to today.

A simple group by

And a simple summary display

The results are grouped by Year and Month but the Month includes the Year and repeats for every Year

The result is even more obvious when you group by Month then Year

As you can see March 2017 is then split into each of the years.

Notice that the cells that are not relevant to that grouping are blank, but still displayed.

Moving on to 2018 shows all of 2017 blank and 2018 populated, then 2019 blank... 

and so on... it's just wasted space showing the irrelevant columns

Is this a known issue? Or did I do something wrong? I don't often build Reports these days....

thanks,
FrancescaS