Ya the slope is sorta slanted. It's hard to find a good mellow flat slope at my local mountain. Yes my weight is tilted back good, maybe I can just post a simple tail press position at home to see if my body position is weird
Well the slope will always be slanted downhill, but are you riding WITH the direction of the slant instead of against the slant when you try to press? That's one of the keys, otherwise it makes it harder to keep your tailpress straight (can still be done, but I wouldn't recommend learning tailpresses that way).