Was the boat assisting in ID of boats spotted from RC end perhaps? 

Thanks for the comments.
This is the first time I have been at an event that used the system, and I was surprised to see how easy it was for documents to be deleted.
Personally, I would prefer that, once a document has been submitted, it should remain in the system until resolved, which may be by withdrawal. Any withdrawal should give a reason and then all would know it had been handled. I don't think it should just disappear.
To Graham -No it is not for the Jury to handle scoring enquiries and they shouldn't. However, I think it is helpful to the event overall if there is an informal check to ensure all competitor raised queries are properly answered. 

I don't think that's what we've seen from the events using it.  And I think it always better to be as transparent as possible.  And even if it were true that it generated more requests for redress (or more scoring inquiries), is that reason enough to not share the information? We see quite a bit of interest in the score sheets when used...

Gordon,  Race Officer is not obliged to inform [BFD] boats

That's not how I read RRS 30.4.

... If a boat breaks this rule and is identified, ...  If a general recall is signalled or the race is abandoned after the starting signal, the race committee shall display her sail number.

I understand that in some circumstances the RO might be having some trouble with his shoelaces and not be able to identify the boat, in which case she wouldn't be BFD at all.

Ang, I understand that in the UK an alternative interpretation of that signal is 'I have an RYA Seamanship Examiner on board.