congrats on the new camper and welcome to the forum. I have the same model camper, it is also a 2010. we bought it new and the dinette slideout has always had a slight tilt. really has not been an issue for us and items have not slide off the table.
Hope you have as much fun with yours as we have had with ours.
HTT: "EscapeII" 2016 Shamrock 23WS (current)
PUP: "Escape" 2010 Rockwood HW 277 (gone)
TV: "Bruce" 2011 Dodge Durango V8 Hemi Crew
Just us gals (me, Sis and our daughters)
Traveled 19520 miles and 209 nights in 7 years and counting