I bought a Martin bow in 09'. 2010 my top limb cracked pretty good while shooting. Had the limbs replaced which was covered under the lifetime warranty. Last year, the bottom limb splintered on the edge, pretty small splinter and the bow shop wasn't too concerned with it and they suggested just to put a small touch of epoxy glue which I did and it was fine. Then just recently I got new strings on it, picked the bow up yesterday. I pulled it back twice to see how the peep sight aligned and I hear "crack". The top limb splintered on the edge about 2" long. Very frustrated. Now I have a small splinter in the bottom limb which I repaired, now the top splintered. Why is this happening?