Sorry to hear that. What were your program goals? In my case it was "cultural exchange" and I made the argument that I am still continuing with Fulbright goals (teaching intercultural communication). Your program goals were probably worded differently.
No idea about the time line. I would think the request might be reviewed by several members, probably time is needed for them to meet, discuss, etc.
I can only guess that the decision is country and/or discipline specific and they definitely review everything case-by-case.
I remember myself going through the process, I can empathize what you are going trough. I received positive response, so all the worries were worth it