I can generally understand the rule in place of having the most current volume cover on display for all entries, but there are instances like this one where having it as the default just...isn't useful. Volume 11 just released on the 18th. Slayers has been working on Volume 8 since shortly after it came out last October [interjection aside, this is not meant to be an affront to Slayers because I do enjoy their work, just a statement of fact for purpose of chronology] -- the "June 20th" listed in this chapter was a year and a half ago.
But maybe because of language filtering that I have on, there's other groups that are more current.