I tried quoting someone and I couldnt turn it off again, I see you lot have it working so it must be me being a dumbass.
What's worked for me is to hit enter a couple times, then go back to the top and hit the quote button and paste in the quote. Once you've created the quote, you don't need to turn it off, just click down below the quote and type your comment. Maybe not a perfect solution, but easy enough.