Somethings not right – Data Manager - Track Usage of Mobile/Wi-Fi Data Plan Review

I don't understand why if I have my data turned off completely and when I check in settings and it tells me my data usage has not moved in 3 days, how is my data manager saying I went from 45% available Thursday to 11% Friday to -22% Saturday and -56% today ❓❓❓
Review by Good_hair_day on Data Manager - Track Usage of Mobile/Wi-Fi Data Plan.