-1 is supposed to be a zero - tis a bug.
The moderation queue is an optional feature that allows you to accept or decline new registrations. Check out the registration settings area of your control panel.
Have you examined those member files? Do you see anything immediately wrong with them (i.e. they're totally blank?)
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Charles Capps
Programmer, Infopop Corporation
Please do not contact me privately for support - post on the board or open a support ticket instead!