Originally Posted by
matio_svk
Thanks, I asked because I did not know how regular this "special department" upgrade procedure affects miles/segments compared the regular way it is usually supposed work (and is described in the wiki), thus if you get I class as well without the "special department"
Fair enough. Yes, the switch to I class is normal (though I've never had this "special department" treatment), and it should not be a problem with the exception of possibly needing to retro-credit, as KLouis points out, so remember to keep an eye out for it.