Conquer Club

there's a limitation how much sets of card you can use in a turn?
I used a set
I took the cards of a player and used 2 more sets
I took the cards of another player 3 red cards and it didn't ask me if I want to use them!

when you eliminate a player, if you have a minimum of 5 cards, you must use them. when you got the 3 red cards, you were under the 5 card minimum so it did not allow you to use them.

thanks