Top CPUs By Percent Load - graph vs. bar

Folks,

just noticed something.

I have a VM with 4vCPUs. On the node details page, I have the 'Top CPUs by Percent Load' graph directly above the 'CPUs by Percent Load' bar chart.

On the graph, only two of my CPUs show up. I'm not sure if it's because of some problem, or if because CPUs with zero utilization don't show up .

Attached please find screencap.

Anyone else see this in your environment?

Thanks.