MNK Infotech interview questions

It's an unusual business model: Find an instructor one week before the scheduled class. I've received numerous phone calls from MNK and interview requests to fill open positions for scheduled classes, even up to two days before class time. During the interviews, the recruiter only knows the name of the class to be taught, and cannot answer basic questions including rate. That information can "only be revealed after some documents are signed". This interview process is odd and raises red flags.