Got one to travel with my 6yo (bring with us to use in rental car at destination). Fits her great, but I discovered that it's not compatible with my car at home. The seat belt gets caught in the guide, not retracting properly, due to the angle of my weird car's shoulder belt. So, it got my wondering how common this is and if this could happen at our destination. Was I wrong in thinking this booster is compatible with most vehicles? Or is my car just really weird and difficult? Thanks!