You could try asking Jinn to change your story codes. He's a very helpful fellow.

If I remember correctly, it's been established in other threads that just having people die in your story isn't enough to qualify it as 'snuff'. In fact, it was specifically decided that Vampire stories (which would be 'gothic') aren't snuff, even though the deaths are usually eroticized.

The story codes are both a blessing and a curse. I use them to help me filter out stories, but I freely confess that I would have no idea what codes to give my own stories (other than 'slow'). And reviewers, including myself, will often rate a story low if it doesn't conform to the advertised codes, so you can't hardly win!