Thanks for raising this issue.
You have been granted permissions to rename those pages.
I have no clue why some of those page names have different name style than others. Can you please unify the naming convention and apply it to all of those "release"-related pages, while keeping the old name inside as an alias if possible?
And merge pages as needed with care.
By keeping alias links to the old names, if someone clicks on a old released version with a link to an old name, they will automagically be visiting the new page name instead (see PageAlias is needed).
Thanks and report any issues to the users list if possible (there is wider audience there from developers and tiki project admins)