Album is Shiritsu Ebisu Chuugaku's recent best album(s). It was released as 2 albums: Chuusotsu ~Ebichuu no ikeike Best~ and Chuukara ~Ebichuu no wakuwaku Best~ separately which I guess you'd count as the regular editions. They have different tracklists and names so different release groups was the most sensible option I thought. But then there's also a limited edition that includes both of the previously mentioned album's discs as well as a 3rd disc in an LP sized CD case, which is titled Chuusotsu / Chuukara ~Ebichuu Complete Best~ that has different catalogue numbers as well . So Basically there's 3 different releases that are basically one release. I just wondered if I'm right in doing what I've done so far - which is keep seperate release groups - or if it's better to put them under one group since they're all considered the same album? More info on Wikipedia if needed.
Why do the Japanese do this to us though that's the real question.