I was in your shoes last July, and I felt your pain and frustration!
Bio mom and dad said they were going to do an identified surrender in 7/08; then, changed their mind. Back then I was so naieve, and was soooo excited about this news- didn't even consider that they would change their mind! They requested services to be reunified in September. Then, 6 weeks later, signed an identified surrender in court. Things can change on a dime! These bios went back and forth so much...it was really hard to deal with!
Stay strong and hang on for the roller coaster ride that is fost/adopt!