I don't know if this is a bug or not but I can prove what I'm saying. In some PS3 match summaries on Battlelog there are also stats from PC players.
See here for an example match
Click the player name LOWREDCOBAIN on top and on that profile it mentioned as a PC player and the stats are all gone. This is not only for this particular match, there are several other matches emphasizes the same conclusion. I read this question, but these match summaries gave me the doubt.
Other match summery example: