What happens to other people's cases is no guide at all what should happen to yours. Every single case is different, and every single CO's work situation is different.
Six days is no time at all, considering as I said above your CO will be working on other cases between the times he looks at yours, and may very well not even have seen your response yet because of that.
When your replies came in, he will not immediately have seen them - they would have been put in your file, but then it will wait until it works its way to the top of the queue and it is its turn again for his attention.
It is normal for you to be anxious while your case is going through, but before you try to contact your CO every time you have a twinge of worry, think how
you would feel if you were working correctly, but someone kept stopping you to ask if you're doing what you should. Any time the CO is pulled away from an active case is more delay till the next time he can get back to yours.