When I view a warning it doesn't really tell me what was done. take a look
I can see the name of the warning & the note left for the rest of the staff but what happened to the user? was a PC sent to the user? was a public notice made? was the post deleted? it's possible that staff member made a custom warning & never notified the user. I can't tell if the user ignored multiple warnings or if the staff member made a mistake when creating the warning & forgot to add the notice.
also, if the warning added a user to a usergroup, it would be nice if it was shown here too. though I know which warnings change the UG, the rest of the staff may have forgotten.
PS : on the page where you assign a warning, if the warning adds a usergroup it should be spelled out there too. perhaps in parenthesis next to the name of the warning