Activities chart in the web ui

At the bottom of the dashboard page of the web ui there is an Activities chart.
It appears each “Schedule” gets a line in the Activities chart.

But I also see a line for each “localhost-x” and these are blank…?
Ah, just answered my own question… each localhost-x corresponds to a Backup task.

So the Activities chart includes both the items in the Schedule tab and the Backup tab.
I must have forgotten this because I have only used scheduled events for a long time!
Thanks as always.