Do you put it all the way into the pool when you unroll it? If you have room to maneuver, you can try to put it half way in and begin unrolling it partially in the water and out of the water. Then, once you've gotten it half way there you can start to float it out onto the pool. It's tricky and takes some practice to figure out how much you can unroll it on the deck before setting it afloat. It does require some room to maneuver, so if you don't have much of a deck around the pool, it may not help you. I do this for my unground pool and, yeah, same with me...sometimes it tucks under and then you have to run back and forth to shimmy and slide it into place.
Good luck.
Matt