Yea, those bows can have their issues. Sorry to hear that.
A work acquaintance was telling me horror stories of his Parker crossbow (not sure if it was the Tomhawk though) having several issues, including suffering a limb failure during hunting season. It would seem a company such as Parker would do well with crossbows, considering their success with compound bows.
I have the Parker Tornado F4. Haven't had any issues with mine. This be the 2nd season I been using this X-bow. The only beef I have is its heavy. It is a outstanding accurate x-bow. Whats funny is shooting it off hand you don't notice its heavy, its well balanced. Carrying it while stalking? Well you do notice and sitting in the stand holding it.