casino review where free spins paid fine but cashback math looked off

Tried a new casino last week and used their free spins promo. Those actually credited my account right after I finished playing, so no complaints there. What got me a bit puzzled is when I checked the cashback from losses and the numbers just didn’t add up to what I expected. I track my sessions pretty closely, so it seemed like they left some losses out of the calculation. I might have missed something in their fine print or maybe there’s a delay, not sure. Wondering if anyone else noticed this or had the same experience.