Scoring a word

Help me out here and I dont want to rain on anyone's glory, but it seems to me that somethign is amiss here in scoring the folowing word in game EXPOUND. By itself the word would be worth 12. It's seven letters so that's double making it worth 24. This word was also spelled across a double corner making it 48. And also a triple corner which I thought would make it 144. BUt it was scored at 288. Is there another rule on scoring I'm unaware of or is somethign wrong in the way this was scored? And either way congrats to Pandora!

:O). I missed the additional double corner. My blunder. Again congrats Pandora!

I wish my opponets would let me collect 7-letter words with three corner multipliers! I don't mind if they are all 1-letters, I will be very happy to score 252, or even 168.

bump