What is puzzling is that you have apparently also checked hide for other parts of the meta info, and those items are being hidden.
I cannot reproduce any combination of hiding other meta items, including the date, the result in just the date and category being shown.
The html output of your site does not include the class that hides the date of posts (the date will be there, but hidden by adding a class to the HTML that wraps the date, author, etc.). So that means the the setting is not being really set. Did you save the settings? Have you tried using the Customizer version of the options?