MyBB Community Forums

I have problems converting posts from phpBB3.
I have some BB code created by myself that weren't merged.
I see that I can create them in MyBB but the structure differs from the other.
Should I recreate all again?

This is my second merge. First one was OK.
But now my username has changed to username_phpbb3_import1 despite I can login with my username
Rebuilt the database but count is 0 for all posts

Forums title contain some italic font and a link and in Admin panel they are displayed like
[i:immfdtnh]Text output in italic [/i:immfdtnh] [url=http://Forumsite.com/viewforum.php?f=15:immfdtnh]FORUM[/url:immfdtnh]
I don't know what to do here.
Please help. This is strange. I retried all installation.
Thank you

The MyBB Merge System does not support custom BB Code's nor modded phpBB installations.

Okay, do you have any suggestion about doing it manually?

And what about that generated username that differs from the original one.

This is very strange. I could import all data from another forum w/o problems.
In this forum (it is a user's manual) there's only one registered user: me.
There are no other posts than mines.
What can I do?
Thank you

The extra information within your BB codes is something placed there by phpBB itself, you're going to need to manually edit those and replace something like [b:23023] with [b]. As for your custom BB code problem, no help can be given from me. I hope this solves your second problem, though.