I'm very much of the opinion that the most commonly used selections in any list should be the most prominent and fastest / easiest to select. Somewhat related to Fitts's Law.
Now, this is an assumption, but I believe that the 'This question does not appear to be about the software that powers the Stack Exchange network, within the scope defined in the help center' reason is the most used on Meta Stack Exchange, yet it's buried down at the 4th of 5 reasons in the modal.
This increase the amount of time it takes me to find and select it. I'm a busy man, I have things to do. However I also use this close reason quite a lot so there is probably a cumulative time benefit to making this reason easier and faster to select. Time is money, people!
I suggest moving this close reason to the top of the list.