Now reporting that User section seems to have fised itself.
Can now see all Users. Did nothing more than log out and log in again a few times Could therefore be that it simply took a little time to fix?
(2) I do see in the "Results" section of the Mailings that only 42 were sent. However, clicking to try to see which ones those were is rendered pointless by the message that says:
"Adobe Flash Player is blocked".