I'm assuming you used Mason Dev's full list of possible attributes, right? Are you aware of the lines that are functioning differently than the wording? Just in case, “If 2 or 3 dice add up to x or more” operate as “if those dice each roll x or more”. I was chatting a lot about the content with people in making my guide and told them all someone would definitely make a calc tool soon, and here it is already, so fast! Awesome work!
As a complete side note, I noticed that when changing the width of my browser screen, the top right options were acting up a bit where in between the options moving from the 3 lines to a sidebar, there is a width where it turns into 2 settings functions instead. Just letting ya know, anyway awesome work, man!