Actually, the control scheme that comes up shows the right mouse button to prime the options, and then the left mouse button in combination that triggers the quickfire command. If you don't use the right mouse button for those options, they're not supposed to cue up. The proof is in the pudding. The initial release, before the first hotfix, worked exactly as shown. The mouse-melee function worked properly, and if you wanted to use quickfire, you held down the block function, and then tapped mouse1. Ever since the first hotfix, it's been broken.