Cheesy, fun, but poorly written

Don't get me wrong. I came into this expecting a cheesy thrill ride, a B-movie in print, and that's what I got. But, beyond all the expected shortcomings that come with that, the writing was so sloppy, both in terms of simple proofing errors and continuity errors. I mean, at one point a guy's arm is torn clean off, but a few pages later, it's back and apparently good as new.