Clearblue advanced ovulation test -Positive BUT faint lines??

So i'm using the Clearblue advanced ovulation test and had a negative test on cd11 (just a empty ring), this was in the morning.

On cd12, i had a temp dip in the morning and i tested positive with a solid face in the afternoon, -BUT the result line on the stick is very faint than the test line. Should i consider the solid smiley face as an indication of LH surge and should not be bothered about the test lines??

On cd13 my bbt was higher than before and has stayed high. What's your experience of this advanced ovulation test and faint test line at the same time?

Based on my temp it looks like i ovulated on cd12. 

The faint line really bothers me.  

Love from Sweden