We have no idea what your stats are. The alumni interviews are assigned based on a number of factors, including the date you submitted your application, and the availability of alumni. It has nothing to do with how strong/weak of a candidate you are, we simply have no idea, and are blinded to your grades/SAT scores.
The RD interviews in my region have not yet been assigned. I would sit tight, there is still plenty of time. IMHO its better to be one of the later interviewees anyway.