Clearly specify the ending of the first piece and the beginning of the next. Do not run the two scenes together. The confidence, poise, and polish characteristic of outstanding auditions is the result of dedicated, concentrated rehearsal and astute coaching. Ask your acting teachers and your coaches to help you with your audition. Bug them until they do.
Adequate rehearsal is vital.
A five minute presentation should be rehearsed a minimum of six hours, excluding time spent learning the material and discussing it with coaches. Finally, don't let the Irene Ryan preliminary audition be the first public performance of your audition pieces. Have a complete dress rehearsal. Style your hair so that it flatters your face, not hides it. Warm up your voice and your body.