I ran your figures several ways, and no matter how I did it, your numbers didn't sync up. So, it's time for questions:

1. What is the deepest WATER depth in your pool?
2. What is the shallowest (not steps!) water depth in your pool?

( The depth of the water, not the distance from pool edge to the bottom!)

3. What was the weight of the salt bags you added?
4. What test kit / strips did you use?