Everything there was imported using the XML import, so there is no review and editing information to lose. On my first attempt to fix this, I exported the 2005 issue to XML, deleted it in OJS, edited the XML file (to change the publication date) and then imported it again. That worked for the publication date, but didn't fix the problem of the 2005 issue being the current issue when the 2006 and 2007 issues are newer. I wondered if exporting and deleting all three issues, then reimporting them in the right order (2005, 2006, 2007) would do the trick? Although I would then have to do it all over again when I want to add 2004, 2003, etc.
I can probably get permission to access the database, so yes, I'd greatly appreciate those detailed instructions.