IF the dividend info is incorrect (I have no idea if it is), then yes the submitter needs to fix it. The same would apply to any other public company which makes a similar mistake. Corrections are not done by PR.
This info is different than submitting periodic reports to the SEC. It's disseminated to the entire investment community, including everyone's brokers, the MMs, etc, telling them what is going to happen. If it's not corrected before going into effect, it could turn into somewhat of a mess trying to change it afterwards.
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"We simply attempt to be fearful when others are greedy and to be greedy only when others are fearful."
-- Warren Buffett