Because a double tap is still a tap. So it’s going to do that as well.
You have a sequence in there so it will run through both of those things without anything stopping it from jumping.
You will want to do another check after your delay to see if the click number was higher, or set a variable from your double tap and check if its false before triggering your jump. Still seems like it will be prone to error either way or you will have a delay before you jump all the time which is unlikely something that you want.