Same issue with our Forester 2701DS
When we did our PDI, I noticed the dinette slide out when extended was more out on the bottom than the top. The salesman said it was supposed to be like that. I spoke to a tech while shopping at CW and he asked if was a floor model. I said it was the dinette on a raised floor. He said that allows the floor to rise up when retracting preventing floor damage. But here at our CG is a Forester with the same slide out and theirs is not slanted. In other words, mine extends more on the bottom than the top. Theirs extends equally.
Going over and chat with Other Forester owner today. I would send photos of mine, but can seem to do it with my iPad.
2004 Winnebago Minnie 22e(went to a nice family Oct 3, 2015)
2016 Forester 2701DS (Aug 31, 2015)
2015 Camping 3 trips 6 nights
2016 Camping 9 trips 28 nights