Hey Dan, I'm assuming your using 5e. Those two numbers are your attack rolls using the advantage/disadvantage system. I found this on the wiki for 5e character sheets. Hope this helps.... "Every attack, save or ability check roll is deliberately made twice to allow for ease of use with the advantage/disadvantage mechanic that comes up frequently in 5e play. The intention is that if you are rolling with neither advantage or disadvantage then the second roll is ignored and only the first roll is used. If however you have advantage, then you choose the highest of the two rolls, and if you have disadvantage then use the lower of the two rolls." Here's the link to that wiki page. <a href="https://wiki.roll20.net/Roll20:DnD5e_Character_Sheet" rel="nofollow">https://wiki.roll20.net/Roll20:DnD5e_Character_Sheet</a>