Okay, so. Looking at claims, we have two problems. One is looking for The Change /the phase changer - actually, did we... ever confirm that The Change even exists, or did we just assume it because of the phase change?
And secondly, we haven't found the one who generated the first item. For one, I find it very odd that they haven't generated any since - but at the same time, none of the killed Mafia cards seem to fit that role.
Which means, either the phase changer and the item creator are one and the same (???), or Katagi is actually the item creator and didn't duplicate the item at all. Giving a gun to a townie seems like quite a gamble, but if successful, they could get rid of a townie (which they did) and make the item generator look town.
But that also means that either The Change isn't Mafia, or the item generator isn't Mafia - or, that Gerry actually wasn't Mafia and we still have two to find.
Also, something that makes me wonder about is this double death. Could it be that Lulu was telling the truth about having a revenge kill, except it was a delayed revenge kill???
Otherwise, there'd have to also be a maf vig, but where are all these roles???? There hasn't been an item generated, so it can't be an item, as it would show as an intermission.