After installing self-storing awning tie-down poles, my awning developed this same symptom, although I have never seen it as a particularly big deal, as it never truly "binds" or appears stressed. I usually just stop after extending the awning about half-way out, which encourages it to "catch up". The front strut then pushes it up to level with the rear and it extends normally from there. I wonder if this is the flip-side of adding a little weight to an awning with the self-dumping feature, which requires that the mechanism be a little loosey-goosey to begin with.
2013 Windjammer 3008W
2006 Chevy Silverado 2500HD 6.0L w/Equalizer 4
Nights camped: 2012 (29); 2013 (26); 2014 (40); 2015 (43); 2016 (35)