I had the same problem and I ended up fixing it, although I don't know which part of this fixed it.
****Make sure you back up your site before you do anything! In one of my attempts to fix this I broke the site and had to restore the backup!****
In the CB >field manager tab I deleted all of the duplicate entries Preferred viewtype, Preferred message ordering, etc. ( I tried unpublishing them but it didn't work for me)
Then when I went back to the front end I noticed that the pulldown menus were not there.
Then I went into Joomlaboard configuration >integration tab and then clicked the "click here" link in the "Create Community Builder forum profile" part.
That gave me the proper settings on the front end, although I still had 2 signature boxes. Then I went back to the CB>>field manager tab and unpublished one of the extra signatures.
Like I said, I did a lot of stuff trying to fix this so you may not need to do all that I did. I'd just try unpublishing the extras to see if it works first.