DrumKits Differents Output Volume - Help me

Hi all!
I have started to create my gig folder and putting in differents songs .
I have bought differents and very goods premium library beats and drumkits.

It seems that the output of beatdubby changes when i change beats.
So , the output level is not the same and this is impossible.
I cant have a a hand on the master volume for all my gig .

Could someone help me?