Electric bill after solar help

First month with solar after net meter installed consumed 57kw. 2nd month meter read was under (-)99922, so $0 bill.
3rd month meter read is 100kw. Charged for 178kw.

I believe I should have been charged 43kw or from 57kw - 100kw. Let me know if im missing something. I will add pics if needed. TIA.