Nope, not a typo (although, it's actually a 2008). The problem that you described was so closely described to how mine is displaying I figured the difference in the model didn't matter much.

But, thank you! I'll be taking it to a good windshield place to have them take a look (nearest Volvo dealer ...

I've got an identical issue with my wife's xc70. I had sucked out the water and had sealed the sunroof (with tape) and took it out in snowy weather... By the time I started my return journey the back side side foot well had become saturated again.

I can hear the sloshing now.

Did you ever find out ...