Gaige's Kill Skill Frames

Gaige’s kill skills (Unstoppable Force and Evil Enchantress) have apparently always properly framed within a hexagon within the game (at least in videos I see as far back as 2012). Why do a number of websites show them squared off? Even the wiki says, “Gaige’s kill skills have a square frame however.” Where did they even get the square-framed icon for those skills?

No biggie… it’s just weird.

Never noticed that, i’ll go check

Edit: well, even that have it squared: