I asking this question, because I started a new Volume: Elfen Lied (Manga) by Tokyopop.
In 2009, Tokyopop had released the manga in 6 issues. In 2016, they had released the same manga in digital form, but in 12 issues. I want edit and add here the digital version of the manga.
In this case I take the digital release date of 2016, since it's a different volume in this case? right?
Edit: Here is the link of the publisher site:
You can choose between "Print" and "Digital" edition. Digital edition is allways split into two parts, which makes 12 instead of 6 issues. This is kind a mess :/