First of all, these are pretty old bows that have very low performance for a recurve. I had mine chronographed a few years back, and it was doing a screaming 117 fps!

Mine has one limb that is a little weaker than the other one. I just put that limb on the top as often recurves or longbows have a little tiller built into them so the bottom limb is a little stronger. They are solid fiberglass limbs, and should be pretty durable. If the bow draws back with no creaking sounds, it should be safe to shoot. You may want to take it to an archery pro shop to have it checked out if it still concerns you. Good luck.