Not sure if you've seen a lot of the posts on here (I hadn't been following until it affected me), but seems like the 180+10 option hasn't been working online for most folks for the past week or so. Be prepared to call at 7:00 with all of your choices as well! The site isn't letting people book beyond the 180 day mark (mine was on Monday). I was thankfully able to get everything I wanted, but it was frustrating, not knowing what was going on, if the problem was with my reservation or not.