You should be able to find your account details which show exactly how your balance is reached.
Your 1145 will be made up of points for your season ticket and how long you've had it. You will also have points for the games you have been to, the wins you have seen, and the goals you have seen. (You only get points for wins and goals you are present for) You get more points for attending a game that isn't on a Saturday.
You can also add points by linking on social media, and spending money at Villa Park using your season card (once you can put money on it)