When do you chop a pot with same pair?

I play a lot of tournaments and have never understood when a chop pot is declared when two players have the same pair and one has a higher kicker.

Suppose SB has A-7 and BB has A-5 and the board runs AJJ9K - is that a chop pot because both players have two pair with all higher cards than their kicker? Suppose SB had AQ - would they get the whole pot because they have a card over the two jacks?

What about if SB had A-7 and BB has A-5 and the board runs AJK9Q? Does SB win the pot?

Sorry if this makes no sense but I'd love if someone explained this to me in simpler terms.