Sometimes when i post something and return a day later my post is gone :( (i still get another post count though)
Any idea of why this happens?

I think there have been a couple of posts that have gotten deleted, but I truely do not know for sure.

Was it racey?

There's no mystic vortex they get sucked into. Most likely you post them in wrong forums and they get moved. Notifications to you are sent to the mail in your profile. Of course, if you used a mail you never check there (which is against the Forum Rules), it's your own fault you never know what's happening.

but if we posted in a topic we didn`t start then we have no idea what happened

When i post a reply it sometimes disappears :(
vary rare though only like 3-4 tiems a month.

Well if it's that rare it's really not worth dwelling on.

Posts can't disappear into thin air... Unless they're deleted. I don't remember deleting any of yours though.

but it was one a couple of weeks ago that someone started a topic with a name like...

"you mother****ers"

it was deleted i think... but i wanted to see the end of what happened...

Well such idiotic topics will obviously get deleted. Especially when the cretins who made them get banned...

ok... thats all i wanted to know...