Ah, ok, I call it minnow math, this is numbers that fall under .01usd on the user interface.
I've been told that the math is done to the tenth decimal, even when it doesn't show on the post.
So, keep plugging along and it will add up.
I started with three steem power and now have more than 100usd.

To the people that understand the code, it is simple,...

You really don't need to worry about the math if your intent is to make a record of yourself, the money is just a bonus?