As a late followup, this is the intended behavior of Labtech. Labtech holds on to the count of good/bad backups in its tables. This data is just dumped over to ConnectWise for its reports. ConnectWise uses all of the data for its reports as opposed to just using the last 30 days.
We have got around this by clearing out, manually, the good/bad backup stat tables within Labtech on the first of the month after reports go out.