Thanks for catching that! Wow, one typo can really make things confusing!
For clarification, Thresholds want you to roll equal to or above in order to pass, so if you roll a 6, it'll always be a pass.
That means when you Enhance a roll, the Threshold is decreased, which means there's a greater chance for your roll to succeed, and conversely when a roll is Reduced the Threshold is Increased, and so the roll has a lower likelihood of success.
That gives me a good reason to push some other edits and additions in, and I'll have a new version out later today! Thanks again for catching that, and I hope you have a fun time with the system!