When you go low carb diet is a disguised "low calorie" diet. When you cut carbs, you cut a major part of the calories that you used to consume. Now when you start eating carbs again, you usually eat a lot more calories. This is where people get into trouble.
If you keep the same amount of calories that you have been eating on the low carb diet and add some healthy and unprocessed carbs to replace it, you should be fine.
Hence all of my above posts.
It is ultimately about energy balance.