We have a 2008 Grand Caravan and one of the 2nd row bucket seats rocks. There is nothing obviously wrong with it and it latches to the floor properly. But when I drive it and have someone sitting in that seat, the seat rocks back and forth as stops are made and accelerations are made. I sat in it myself while my husband was driving and it felt like I was in a rocking chair. I have sat in them before while on vacation and they never did this. Any thoughts on what may be the problem and if it is a safety issue???? We will be going on vacation this summer and don't really want anyone sitting there until we know for sure. Thanks so much!!!