My slideouts look very similar - they don't retract flush to the sidewall. I took it to my local Heartland dealer last week and they're saying it's normal and to not worry about it as long as the rooms aren't leaking. They did lube the slides for me but said "if it's not broke - don't try to fix it"...meaning, they didn't want to mess with the adjustments as long as the slideouts are sealing okay.
I'm not completely satisfied with this as an answer, but have to believe that my Heartland dealer's service department (and a technician with over 20 years experience) knows what they're talking about. To think otherwise really would p**s me off.
I don't have the long protruding screw, however. You might want to get that changed out with one of the correct length.