jesse, The right limb in the photo looks a touch stiff right outside the grip, and this can transfer the bend through the grip which because of its leverage can pop off the glued on handle at the glue line.
Tillering bows like these can be interesting since there can be a bit more tiller change in the limbs compared to straight ones since not all the grain is straight and may settle a touch more under load....I'm another one who like leaving the knots well knots..Ya have enough wood around it that it won't need support..If it's punky, I just let it fall out or clean it out. Thats where the cigar goes for the photo
Rich