GlassWire Timeline at bottom of Usage screen

So I used an App while GlassWire ran in the background. I look at the 24hr day time line and it shows usage during the hour I was on. It also shows usage for 3 hours beyond the current real Eastern Time zone I am in as though it knows the future or is showing me usage from 24 hour ago. During the earlier part of the day, it shows no usage even though I was on most of the day. I clearly do not have a good picture of what it is telling me. Could you refer me to or give me an in depth explanation of what I am seeing? If I click on the App I was using, it show’s 249 hosts. Does that reflect the period chosen at the top right of my screen or the past 24 hours?