Hi @thrtnastrx ,
To begin with, Megabits are used to describe network speed and Megabytes are used to describe storage/disk speeds.
Based on this document - ESXi Network Performance, network is measured in 'Megabits per second' on ESXi hosts.
It seems like that's how network graphs are labelled(mbps) on ESXi hosts as I see the same behavior in 7.0 as well.
Hope that helps