People with the top kills/round were more of people that played just 1 round and got a double or something, the bottom of the list is probably better at gauging consistency. Just from what I noticed while doing the stats.
Works for me, currently have his stats page as my signature (gyazo: https://i.gyazo.com/1416743648427af010731df08ba1443a.png )
I'm currently using Firefox, and I right-clicked the link and clicked "Copy Link Location" and then followed the steps.
It's possible, don't know.
Take this link: https://olympus-entertainment.com/olympus-stats/red/76561197979854574.png
1) Click on your name on the top right of the forums so the dropdown menu shows up
2) Click "Account Settings"
3) Click "Signature" on the left side
4) Paste that whole link that I put above in the box where you write what you want as your signature. The link should pretty much instantly turn into a picture of your stats banner because it's a direct link to an image. It should also automatically update along with your stats. Also add anything else you might like into this signature box.
5) Click "Save" and you're done.