Why have my carbonation level dropped

[Libigage]

Hi, I've just set up my kegarator and added a 4 valve gas line manifold. Problem I'm getting is My beer is less carbinated. Any suggestions

 

[Obadiah Boondoggle]

I guess I need more details

Is the temperature different now?

What pressure are you putting the kegs under?

Is there less pressure in all 4 kegs?

Why is it that wrong numbers are never engaged?

 

[Libigage]

4 valve manifold, only 2 kegs.upt the pressure to 20psi in both kegs