Clomid and false peak on OPK?

I finished my first round of clomid on cycle day 7 and tested on clearblue digital on cycle day 9.  It showed the flashing smile, and then the next day, cycle day 10, I tested again and it was a solid smile. On cycle day 11, I tested, and it showed no smile, so I figured I must've ovulated around cycle day 10-11. Just for shits and giggles I took another test today, on cycle day 14, and once again, there was a solid smile. Luckily, my husband and I have been BDing since cycle day 7, so we should be good to go, but was wondering if anyone else has experience this - two high peaks or a false peak etc while on clomid?