Well, I know that this anecdote will be discounted because it's about an NDCA event and because, to many poster I'm nothing but a scum-of-the-earth pro-ammer.
Nevertheless:
Not too long ago I thought, for work- related reasons, that I would have to forego a competition that I really, really wanted to enter. It was well after the entry deadline that my work-related project was resolved on an accelerated schedule. It meant that I would be able to enter the competition after all. I spoke to my pro, who spoke the organizer, who let me enter late. My pro and his partner decided that, since they were going to the comp after all, that they wanted to enter the Pro event for their style. The organizer allowed it, even after the deadline. The organizer even waived the late entry fee for both myself and the pros. So, yes, my Pros entered their Pro event late, but it was not because of poor planning on their part or because of any disrespect to the organizer.
No spectators were harmed by the late Pro entry and the failure of its appearance in the program.