Yes you are correct but, either way you will be out of Ketosis for a day or so, I guess its a matter of how hard you really want to be able to train while in this deficit.
If your training is suffering and your lifts are dropping I would suggest two refeeds, it can't hurt and if it doesn't workout for you, you can always drop it and try what you originally proposed. I just know from my experience that my workouts were significantly better after refeeds.
Yea i agree with this I do not think refeeds are that necessary at all at least from my experience. When i originally did Keto I did 0 for a long time (other than a maintenance week to take a break from the dieting).
However, when I did finally stall which it took a long time, I added once a week refeeds and I could squeeze out a couple pounds so it can be effective towards the end of a diet IMO...