Some of my posts suddently disappers and my stuff goes negative.
That's probably a good indicator you need to make higher quality posts. I'll check the logs, though.
Did you offend someone? Did u uz3 L337 L4ngU4g3? Or did you spam lo llo lol oll ol lol ol?
Those are the main reasons posts get deleted.
Spam in Assistance often gets deleted by moderators.
Read topics carefully and always make only thought-out replies if and only if you actually understand the topic.