I suspect your "conflicting information" is that because Coronado Springs is often used for conventions, conventions can rent out Maya Grill for a specialty convention-only breakfast. This is usually a buffet, and sometimes includes character appearances.
However, this is not available to a vanilla resort guest, and are one-off rentals for specific audiences.
Long ago, the Maya Grill did offer a breakfast buffet because we ate there. But it was a long time ago. More than 15 years ago. Now we just go there for dinner and drinks. And the music.
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