Slide adjustment for dinette and sofa slide

[Jayco Journey]

My dinette tilts down in the direction of the ground. Should I adjust the slide up to compensate? Is that even possible? The slide operates perfectly. I’m troubled that the dinette slants .

 

[ALJO]

Please state the RV model and slide model. Adjusting doesn't help only when constant rubbing on the floor. It is perfectly normal for slides to tip at a certain point and then come up again. Sand and gravel on the floor is not a good think for vinyl flooring.