1. dont mind frnd but still not sure. can you explain via screenshot ??
2. See this (centered manually)
I am centered manually
and this centered through click
I am centered on click
The code is same i.e. [CENTER] so there is no way that it doesn't work
3. I think
this is what you are looking for. It directly uploads images on ImagesHack server and in return, it gives you a link that you can insert easily to display images without attaching !!
hope this helps !!