Honestly - Thanks for all your support and assistance.
Really appreciate it - but to no avail. I've spent ample time trying to solve this issue but my efforts simply don't produce anything of value.
I've located the responsible plugin but before disabling it permanently, without knowing what may happen to existing posts when a solution becomes available, I am just somewhat hesitant to continue using vbCover's Magazine.
Shame - was VERY much looking forward to using it.
I'll wait until Lionel comes back online - probably hiddeously busy at present with recovering his site(s). Understandably.
[I guess what I really need are some expert eyes who can look at the way things are set-up within my AdminCP...]
Thanks especially Lynne. Outstanding moderation.