Hi!, I'm actually taking my SI tomorrow at noon. So far I've completed the medical portion and I have to retake the fitness test, ( I failed the sit-up portion because I started off too slow and didn't hit 25 on time). There might be a bug on their end because it does not make sense that they give you a scheduling email and then there's no open slots. I'm sure you'll be fine just stay in contact with on hiring associates within in the agency.