I personally do not think that the neutral tag is worth it. I read your post in his self moderated thread, it was very much on topic and doesn't deserve to be deleted. My own post was also deleted by him but I took it in a good fate.
If you are going to post in a self moderated thread, be willing to accept harsh moderation
I will remove the neutral tag after a week when everyone would have seen it.
Why leave the tag at all if you are going to delete it after a week? If the tag is justified, then leave it, no point in removing it after you think enough have viewed it. The only time to remove a tag soon after placing it is maybe if a scam accusation pops up on a user and you feel the accusation needs acknowledged. I have left a couple for sites when a user seems to have a case and the site needs to reply.
Far as the notblox situation goes, for the most part a manager has the final say. If you don't like his say, take it up with them through pm. If they outright scammed you it's different, but this is not an outright scam. Just don't join anymore of that managers bounties if you don't like the way they manage. My 2 cents anyways.