The different bolts don't matter mate, what's important is they're the same setting both sides on the markers, this gives you a pretty good chance of them being aligned. I usually measure from the lip adjuster to the end slot, if it's the same each side then I'm good to go. Don't worry you're defo not out of your depth, I think you're just getting a bit flustered have a go again in the morning with the help these gusy have given you and you'll find it a doddle. If you're really stuck a garage would probably align it pretty cheap for you, then it'll be easy to keep on top of.