Apparently my X-Men AU is Harry Potter-ish already?

I write like
J. K. Rowling

I Write Like by Mémoires, journal software. Analyze your writing!

I've made a lot of Harry Potter references in my X-Men AU mostly for the hell of it, but I recently did this writing meme (you copy and paste in your writing/text and it analyzes word choice and frequency to see who you write like) several times, on my recent or soon-to-be posted chapters of my X-Men AU, and each one came back as "You Write like J.K. Rowling". Including the chapters with zero Harry Potter references in them.

I love my writing being compared to hers, but now I'm creeped out. If it had just been the chapters with HP references I could see where it would come from, but I did it again with the chapters with no references and it still says JKR.

Which is odd. I'm getting different results for different fics (I keep getting Douglas Adams for my BB prologue).

ETA: I've now done this for several of my fics, and all of them come back as either "J.K. Rowling" or "Douglas Adams", mostly JKR. o.O