I have had my 355 since march. We have used it once for 4 days. We did not have any problems with it then however we did not try the spray ports. We are leaving next week for 5 days so I will check the things you mentioned and see if the same problems exist. We used our fireplace all 4 days on the first trip with no problems with it or the stove.
2013 Sierra 355RE ( The Palace )
2012 Dodge Ram Crew Cab W/ 6.7 Cummins ( The Goat )
Me, the wife, 2 kids, 2 labs (they dont travel) and 1 Shih tzu (he does)