The creases or indentations are a result of the weight of the slide. Although I have not made an adjustment on mine, I have been told by an expert that the slide can be adjusted to reduce or eliminate the carper problem. You could look at your slide on the outside and see if some adjustments make a difference. You can always return it to the way it was.
2014 Palazzo 33.2
Cummins 6.7 ISB, Allison 2100 6 Speed