Help with a newbie and a jumpy blade

[ny70]

So about 2 years ago I switched to a DE for all the usual reasons. About 2 months ago I picked up a shavette and discovered what a great shave typically using feather DE blades. So last week I picked up my first true Straight Razo a Dovo Bismark from SRD. I was surprised that I was haveing trouble shaving since the shavette was like second nature. I'm getting a lot of tuging and the blade seems to jump on me. Obviously I'm not doing something right. Was hoping you guys could help diagnose the issue the help speed thelearning curve. In terms of razor sharpness the blad does cut hair in the HHT but more often then not it will shave the hir length wise as aposed to just cutting through it.
All help for the newbie is appreciated
Thanks