Getting the secondary bevel correct using the DBS 22

[Baldeagle]

Hello from NZ,
         I've owned a T8 for a couple of years, I've just bought 3 new CBN wheels and I have a selection of jigs, I really like what the T8 is capable of doing. I've been reading all sorts on this forum but my first time with my own question.  I consistently have trouble sharpening a drill bit so that the trailing edge is lower than the cutting edge, I have 'played around' with the way I set the cutting edge with the lines on the drill bit holder, I use the magnifier, I've played around with the settings abit and I'm no longer sure which lines I should be using, I seem to get a better result by lining up on the angled lines.  As for doing a secondary bevel (on a bit that I've fluked a correct grind) the secondary grind always ends up being out of parallel with the primary bevel .... any clues please and thank you in advance.