Req Packs

Hi, guys!

So I have a couple questions for req packs! So, how come there are no selections that come up when I click on a card? Next, when I looked at my vehicles and power weapons, and power ups, can you only use one per match on warzone, like if you have 5 scout warthogs, and you use one in a match, does it take on of the duplicates, and leaves you with 4 to use, and on and on?

Thanks!
Shakablepit1842