Subfolder sort bys are different from Inbox in MAIL

[Help Please]

Netscape 4.0+ (4.76 specifically) - Does anyone know how to fix the
fact that all of my subfolders only show recipient as well as
everything else, but not sender?  The Inbox is the only one that
allows sorting by sender.  Even the menu changes to show only sorting
by recipient when in a subfolder ( View | Sort | by Recipient )