Your staking depends on the age of your coins and how many coins you have. I don't believe confirmations make any difference.
Do you mean you got staked amounts but they're not being confirmed? Sometimes a staked amount doesn't get confirmed and if that happens you will stake more later, because your coins will be a little older by the time it does stake.
Also, just as a heads-up, you will likely fail a LOT of stakes. I personally see around 60-70 "stakes" that aren't accepted before one is, so don't worry if you get a stake and it goes gray, and this continues to happen. It's normal.