100 Units Loss in 7 Hours Play: Advise Please

Game: 2D, H17, DOA, DAS, RSA, 75% Pen. Does this game "SCORE" at least 50?

Yesterday, I played 7 hours straight, with s short dinner break, at my local casino with the game listed above. I've never suffered such a large loss in one day of playing blackjack before. I was using KO with 1-8 spread, max bet only when the RC hit +8. I lost 100 green chips ($2,500) just like that!

Is this normal?