Well it sounds like your application is very competitive. It may be just a case of waiting that little bit longer for a spot to open up. You could try calling Tamworth FSP to try and get an idea of where you're currently sitting in the pool. I was medically cleared around the end of July and have been placed in the Feb 12 FSP so thats a solid 6/7 months, I also considered myself fairly competitive.
Also, did you say you would consider an ACO position? That would be why they are offering you the OSB for that first as opposed to FSP.
Hopefully you hear some positive news soon.