Is this normal? rearfacing marathon, next to IMPOSSIBLE to tigthen the strap. Don't have the problem with the Roundabout that's rf'ing right next to it. But it's a pain, I have to take the seat out and pull it down in order to tighten it, so it's kind of a hassle because it's always at the same setting (which is good) but difficult to put on sometimes if she has a fleece jacket or I put a disposable diaper on her or something. Is this normal? I never thought to question it, I just live with it, but after reading the BV threads I'm starting to wonder.