The original example was

* Owner= [log in to unmask] (First Name), [log in to unmask] (Second Name)

I believe everything past the blank after "[log in to unmask]" is treated as
comments.  People put all kinds of stuff here the help identify the owner.
If you really want this concise style, then you must say

* Owner= [log in to unmask],[log in to unmask]

and forgo the luxury of having names on this header.
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Bill Verity - 814-865-4758  Fax: 814-863-7049
Postmaster & Listserv maintainer
Center for Academic Computing, Penn State University
At the office - on my Mac, of course ;-)