Agree with aw...
Crossbows are not designed to have their limbs "adjusted" ! The limb to riser fastener is overly long like a vertiacl bow.
You could easilly have that thing blow up in your face, because there is only a coupla threads holding the limbs in place now that they have been adjusted. With the load on the limbs and hold down fastenersonce cocked...look out!

Yea, tighten'em back up.

Properly used the rope cocker should make a big difference in the effort to cock the bow.
You might need to shorten the rope or get new rope to make it longer to fit "you" better.

Mike