The Stack Overflow moderator queue works really well when there's only one moderator clearing flags. Once you get two or more moderators clearing flags at the same time, things get jumbled. Here's what I mean:
When closing questions, you get a dialog that says, "This question has already been closed, please refresh status."
When you clear comment flags, there's no indication the flag has already been handled. If I click 'dismiss' or 'delete' on a comment flag, it goes away, regardless as to whether I handled it or someone else handled while it was still showing in my queue.
When clearing 'not an answer' flag, either by marking as helpful and trying to delete them, or trying to decline them, there's no indication in my queue when someone else handles them before I have a chance to.
All these problems center around the same issue: Two moderators could be clearing the same posts at the same time and wouldn't realize it until they took specific actions (closing a question, for example).
I literally had a few instances recently where I thought I was clearing flags, only to realize another moderator was handling those flags at the same time and 'got the credit' (hey, you do measure us on how many flags we handle). It's led to... frustration.
Please make the moderator queue on Stack Overflow more useful for multiple moderators.
automatically clear posts from the queue when they've been handled, using the same push notifications in use for the rest of the site
If the system notes that multiple moderators are handling flags, perhaps splitting up the flags between the moderators?
Put a box in the right side of the moderator queue page showing which moderators are actively handling/clearing flags. Right now we have to go to the main moderator page to see that.
Make the moderator queue page faster. It takes a good amount of time to load compared to the rest of the site, and I've had it happen that by the time it's loaded, another moderator has already cleared 10-15 flags that show up at the top of the queue.
I recognize that we're a small demographic, and when you count that it's probably only the Trilogy that gets this many flags in a day (and none as many as SO gets), it gets even smaller; but these problems I list are daily frustrations for moderators.
It's gotten to the point where sometimes I'll just jump a few pages and hope another moderator doesn't do the same.
Please include your suggestions for how the moderator queue page can be improved.