i have a question that raises doubts. several times my post or reply was deleted. and i think my post is not out of topic or the thread i reply to and always use more than 200 characters.
The number of characters in your post is the concern of signature campaign manager and not the forum nor moderators that handle the deletion of posts, you post can have as little as characters as possible, so long as it is on-topic and constructive it won't be deleted.
i've tried several times and it happened from last week. so i don't meet the minimum posting requirements that already exist in the signature campaign rules.
If that is your issue then try and make constructive posts that won't be deleted so you don't miss the requirement for your signature campaign, even if you definitely shouldn't be posting solely for that.