Keep in mind that as a Miller I know there is an investigative role. A lot of aus on me is a good reason to claim. Usually the cop gets 1 or 2 investigations in a game, even if they are not X-shot so I didn't want them wasting their shot on me so I have a good reason to just go ahead and tell them what their result on me will be.
I recognize that you had a good deal of sus on you, but you didn't have a lot of votes. The most votes it looks like you ever had on you was 2, so I wouldn't say you were ever pressured enough to effectively force your hand. If your goal was just to prevent a potential Cop from using their role, why wait until that late in the DP to claim?
I know I didn't visit mharman so I am not sure what the deal here is today. Behaviorally speaking I had a town read of him but mechanically, knowing I am town this makes him scum.
I don't understand his gambit here unless he can obscure my affiliation upon death but I wasn't misdirected last NP because Casey's name was in my PM and I would be in a PM with mharman right now if I was misdirected.
His results are wrong or he lied.
There could be some fuckery going on here, but if you actually used a Neighborizer, got confirmation that you were successful, but have no one in chat with you, then as I see it there are a bunch of options.
1) You're lying.
2) There's a hidden role at play in either your or Mharman's roles and it's modifying the result.
3) Scum have a role that's changing what Mharman's role is perceiving.
4) He's lying about his role.
At least for now, I'm ruling out #4. I don't think Mharman would choose to make this a heads up when, as you've said, circumstances didn't really require it - you were already being sussed. I believe his claim. I haven't heard of a way to obscure affiliation on death, but that's really the only way your flip doesn't put him in the crosshairs.
I know you've mentioned a few times that there's the possibility that the game ends next DP, which does exist, but that's not really going to affect what happens now. Someone's going to get lynched, so it's kind of a given that we have to accept that risk.