Love Once is expensive everywhere, I paid 91 USD for it via NCSX. ><;
It hasn't happened to me before, but I read on a Japanese forum (2ch) that it happens if you're offline and install a new trophy set for a new game, then the trophies might not have time stamps. Supposedly, if the list is already installed, you can earn trophies normally and the time stamps will be fine, it's only a concern if you're installing a new list offline. Dunno if it's true or not, I'm just the paranoid personality type who would rather wait 24 hours than risk it, haha. Did you install Portal 2 while PSN was down, or was the list installed beforehand?
Actually I haven't started it yet b/c I'm concerned about the "no time stamps" bug that happens sometimes when a trophy set is installed while offline. Gonna wait 'til PSN is back online... Hopefully it'll be SOON!
Are you gonna get Haruhi and Hiiro no Kakera too? Man, 2011 has been busy for us importers!