I just posted an answer and immediately noticed a typo. It now won't let me get back in to edit the post. I retried several times and also waited between tries. I even left the page and returned to the question and tried again. No go. All I get is this message:
If someone else can get in please edit that "sin't" in example 1 and any others you might find.
Cache coherency problems at the outer layers of Stack Exchange... We hit a similar anomaly a month or two ago where a tag page showed up incorrectly for some and correctly for others. You switched caching servers for some reason, and the second was not yet aware of the post. The cache will fix itself within a few minutes.