If your problem is noise, you can try sample averaging. That will increase your signal to noise ratio. I definitely recommend at the very least to find the new equations using the experiment I did. That should help the most. :)
Also, that's a great thing to point out but in the datasheet they recommend implementing a low pass filter. The error I made was going above the recommended 50kOhm resistor value! Thank you for bringing that to my attention.