There is absolutely NO reason to be rude. You posted in a bugs forum, claiming the inability to slot a set enhancement into a power that does not take any set enhancements is a bug. It's not. Despite your repeated protestations we did actually read what you posted, and I went out of my way to load the game and take screenshots to show you how to recognize when powers can take set IOs, and that Swift does not. It's not a bug. It was done this way on purpose.
If you believe this limitation on Swift and Hurdle should be changed you can post that in the Suggestions forum. But as others have pointed out, there's at least one good reason why this limitation exists.