When I began my cooking skill, my chance for fried meat +50 was 70.0% and around cooking lv 6, it was 70.17% when I checked. I'm thinking that I have a lot of cooking to do if that's all I've gained. Now at cooking lv 8 and 90.5% to lv 9, I look at my chance at cave goblin meat and it shows 68.3%. How can my ability to successfully cook cave goblin meat have dropped to less than my chance at lv 1?

Without having lv 9 cooking (or being allowed to do so), I have a greater chance at fried meat +50 x2 from forest goblins at 76%.

Was it always ever random no matter what level?