OK listen to me if you want I'm only a "Coporate Staff" guy too, but I know what I'm talking about:

First just to be safe because I don't know what you've been doing.......back the bolts out and start over. You DO NOT want to overtighten these. when you have each one loose tighten each one just enough to be snug. (maybe1/2 turn after you feel them sinking home)
You notice a space between both sides of this cap (top and bottom) and it appears almost like two sides of a set of scope rings.......your goal is to NOT NOT NOT bring these 2 sides together. You will cause the cap to crack.

It is easy to overtighten these because they have that synthetic pad between the cap and the limb facesand the screws will keep going until you've gone to far.

In your case if you were wrenchingon them, backeach one out until it's loose and then just snug them lightly and equally. THAT'S IT.They should be set properly from the factory and only messed with if for some reason one backs out and isobviously loose.
If you haven't touched them just leave em' alone.