There is some formatting issue. Data data is from Vanilla. I have bbcode installed. What am I missing?
We have the same problem, I think the bbcode plugin doesn’t support nested bbcode tags.
hope they can give us answers 
I suggest remapping BB Code use into proper markdown.
sir what do you mean by remapping?
how can we remap gem bbcode?
There is a section of the importer that replaces stuff in the original posts with . . . different stuff. You want to make it convert [b] -> <b> and [/b] -> </b>. Like that.
You’d need to show the text that DOES NOT work fine from the original post you showed. When you do, put ``` on a line before and after the raw text of the post that is not displaying as you wish.
The problem is with nested bbcode. Do i still need to remap? or discourse just cant handle nested bbcode ?
As mentioned above the bbcode plugin doesn’t handle nested tags. Discourse doesn’t handle much of any bbcode out of the box.