Eclipse..Lobster and Couple-seat...

I was hoping to have a 'kaki' to watch 'Eclipse' (part 3 of the Twilight Saga) with me.. Lay Choo was interested but she went with Ee Meng in the afternoon while I was at work. So as it turned out, Frances had 2 free Cathay tickets.. Yay!!! We decided on Teppanyaki for dinner.. the special lobster set which included pan-fried and soup-based lobster in its shell.. and lobster meat sauteed with garlic.. Then we proceed to the cinema and discovered we were the only non-couple to occupy a couple-seat at the back at the theater.. as expected I guess? Then about 5 mins into the movie.. a Caucasian pair plonked themselves on an empty seat down our aisle.. but another couple, who were apparently the rightful occupants of that seat, arrived some 30 mins later.. Talk about disruptive behaviour at the movies!!! Why would anyone presume it was free-sitting when the numbers on the tickets state otherwise? *SIGH*