When you buy one actor, say colin firth, @ 2,000, you seem to end up with 4,000 shares! That's what happened to me.
Also, when you click on the "Trade" button on rollover and try to buy or sell, for some of the actors listed I get an error message. I can get around this by clicking on the link to the security page and purchase from there, but can't roll my mouse over & purchase from the dialogue box like I can with films and the rest of the securities on the site.
Otherwise, great work!