I've done Blood On The Ice around 8 seperate times and I've never had it bug whatsoever, I don't see what's broken with it now that they've even patched it. Only problem I have with it is the chets in Hjerim by my bed never shows up, but that's besides the point.
Use UESP and follow the directions precisely (it tells you how to avoid every possible bug) and you shouldn't have a problem, unless you're TRYING to go out of your way to break it. (Which would be silly)
I thought I mentioned it in the first post, but perhaps I didn't. So let me re-iterate...
I followed every guide known to Google and the UESP in order to keep BOTI from breaking, and it broke anyway. See the thing about guides is that, in order for them to work, things would have to be consistent in their execution. Well... Bethesda's weird way of making things function is Legendary at this point, so I'm sure you're aware of the fact that following a guide doesn't necessarily mean something is going to work, even if has no logical reason not to.
Besides, BOTI is completely irrelevant to the problem at hand.