If you use the purple Clearblue Digital Advanced Test Sticks in the Regular Pink Clearblue Digital OPK Test Holder can it give a "false" smiley so to speak? I had leftover purple sticks from when I previously used the clearbue digital advanced opk, and used them in my regular pink clearblue holder since you cannot reuse the purple advanced test holder. I'm now wondering if my smiley on CD 16 was a super early smiley since it was the purple advanced stick, and wouldn't show up flashing on a regular pink test holder. Anyone know?