In some AAC files bought from mora.jp, bitrate cannot be correctly calculated in MB.
An example is shown in the following url.
http://imgur.com/fQjY3M0Displayed: 8kbps, Correct: 320kpbs
I confirmed that playing these files in MB did not have any problem and other softs (foobar, poweramp, mp3tag) could calculate the bitrate correctly.
I don’t know why some AAC files can calculate correctly and some files not…