2 solid smilies in 3 days with clear blue advance

i am using clear blue advanced with dual harmone indicator for the first time.

It showed me a solid smiley without a flashing smiley on my 13th day (after period). The smiley was there for two days. When i checked on 15th its gone tonormal (a circle). Then on 16th day it showed solid smiley again. Whats happening?. Have i ovulated or not.
I am not taking any medicines except prenatals. my cycles are regular 35 days length .