Please explain what you think is wrong. Are you just talking about the furigana? The (presumably automatically generated) furigana should be ごろ for sentences 1 and 3. If by usage you mean how the word 頃 is being used, I don't see a problem with the way that 頃 is used in any of the sentences.
So if you're talking about the readings, then I agree. If you are talking about how the word is used, I disagree.
These readings come from a separate set of files that's managed in the scope of the Tatoeba project. I've updated the reading for sentence 1 and 3. It will take about a week for them to show up correct in Jisho.
Thanks for pointing this out.
Error?
The usage of "ごろ" or "ころ" in the examples are wrong, aren't they?