When going on top of a rug you place the felt side down leaving the rubber side facing up to grip the back of the area rug.
How to get a kink out of a rug.
If the corners of the rug are curling curl them backward flatten them back out and place weights in just the corners of the rug.
Once we put the rug on top of the pad we walked over it a few times to make sure the two surfaces made a connection and that the rug was flat.
You may have to do it on the back to get the kinks out and then on the face yarns to get them to settle in with the rest.
I used to always trip over the rugs in my front room i have a runner over the carpet to the kitchen and one as you walk in.
Use a drapery steamer.
Put a clean dry towel or two over the wrinkled rug then put the hot moist towel on top of that then lay something flat and fairly heavy over the whole shebang i usually pile on a few more.
Place a piece of furniture or a stack of heavy books on the creases for a few days to flatten them out using weight.
I cured this by using a staple gun the pile is so deep you cant see i have stapled the rugs down.