Deleted Users?

[Jaejoong1]

Hello,

Recently instead of reinstalling my forums to wipe all the users, i manually deleted all the users. When some of the same users tried re-registering it said their name was taken when it wasn't, is there anyway i can fix this?

The Username Reuse Delay is already set at 0 for disable.

--------------- Added [DATE]1336528782[/DATE] at [TIME]1336528782[/TIME] ---------------

Edit:

I could register with the old names again, but the message of it saying that it has already been used or does not meet administrator standards still pops up, any thoughts?

The Username Real Expression or whatever, reuse delay and others are all empty.