It could be that James's grave is the one next to Lana's and Bella's still in denial after all those years. I know she said he has only been gone for a few years, but if the unnnamed grave is his, it's very unusual that his grave would be next to Lana's in what seems to be a public graveyard. Then again, you would thhink that after about 10 years or so (which I guess the game place takes place after Lana's death), Bella would be over it.
Yeah, that isn't on every path though, even though he says it on every path