I had not noticed that before. The original recording was on 2 and 4, but I just loaded it up and it does play on 1 and 3.
So, I must have loaded it that way when I created the RealDrum file for it (chopping off beat 1).
I'll revisit it when I have time - and, perhaps create one specifically for 2 and 4. In the meantime, like Matt says, you can shift it by a beat...