You might want to reconsider this method for narrowing down your reviews. If you group your reviews by level, you might start associating the review item with the correct answer based on how long ago you learned it. This could help you get correct answers (particularly with similar looking kanji), but would be detrimental in the long run. When you’re reading real material you won’t be able to remember based on how long ago you learned the kanji so you shouldn’t get in the habit of doing so during reviews.
If that doesn’t happen to you then great. But that’s why I’ve always avoided sorting by level during reviews.