Longbowpaul,
Wellcome to the instinctive shooting!!!
That is and that will be as long as you shoot instinctively. That is not the problem, you will have a problem if this happends 5 of 10 shooting days.....
Shooting, shooting, shooting, working your form, your release, taking care of your equipment, mental work, and so on, and someday you will find yourselve shooting almost well 8 of each 10 shooting days.
3 months is, at least for me, a very short period of time to be able to shoot instinctively with some confidence. If youre able today to shoot some days 3 arrows in a coin, the first three ones, for sure you are in the right path, but doing that always.... will take some time. Enjoy that time!!!!
Regards,
Emilio.