As they say, a picture is worth a thousand words:
The moderator here is not the original poster, but on the comments by the aforementioned OP, his name has the OP background. On the other comments, he (correctly) doesn't.
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I just encountered this on The Workplace (and then looked for it on Mi Yodeya to verify it's cross-site), then started to post the bug report and found this question. This is new behavior for me (I'm pretty sure!), though the OP reports that it's been broken on SciFi since this bug was reported in 2014.
Here are some screen shots with a little less eyeball-bleed:
This actually seems to be even more important now, because it seems to control the presence of “undelete”:
I’ve run into this with a few invalid auto-deletions that I couldn’t reverse.