Diagnose Command Bug?

[ScruffyMcSmirkalot]

Hello!
 
Not completely sure about this...
 
But as far as I know, when diagnosing someone, there's five answers:
 
Diseased
Having been Diseased
Poisoned
Having been Poisoned
A-Ok
 
And then I'm not sure how well it handles when people are poisoned and diseased... or poisoned and previously diseased... or any combination thereof...
 
The point being though, I've been getting results back where people are diagnosed as "Having Been Diseased" when they're still diseased.
 
Anyone else getting this? or any other bugs with the diagnose system?