Different; Sibling = The Other Sister
Container; Canines = Reservoir Dogs
Flood, country = Tideland
Argument; Society = Fight Club
Game; Kid = Wild Child (Game as in wild animals)

Just to throw my hat in the ring, is the first one Another Brother and the last one Bubble Boy?

All I can think of for the fourth one is Fight Club, but it's two words, so I'm confused.

The third one isn't Waterworld, is it? That doesn't quite seem to work.

No clue about the rest (except Beetlefire's guess, of course, which seems perfect).

~Neshomeh

... is Reservoir Dogs?

But I think s/he means the winner is whoever gets the most correct first. If someone stole yours, it wouldn't count, because everyone would be able to see you had them first. Also, by this logic you're the winner. In case you hadn't figured that out already. Which I'm guessing you probably had. I'm going to shut up now, before I drive my foot any deeper into my mouth.

Hope that a) makes a little more sense, and b) is correct. (Yes, in that order of priority, for the seminaries of Russia teach the wrong lessons quite well. And if you can figure that joke out, I'd like you to explain it to me some time...)

Jay (a member of the corvid family) Thorntree (a lycium).

The remaining one leaves me puzzled.