I have a 2013 3170, computer desk on rear slide. An RV repair place made the same observation about mine, thought it might be "off a peg" on the rack. Well, it goes in, and it's against the side (no gap) but the repair person thought it wasn't as tight as it should be. For now I'm not doing anything. But if you have a gap, might want to ask the dealer and see if warranty is available (should be, 2016 is pretty new....)
JJ only, my cat went to Rainbow Bridge July 2015
I love my Sunseeker, when I'm on a trip I don't wanna go home!!!"
Total days camping each year: AS MUCH AS POSSIBLE!