Help!!

I used the same urine and dipped them one after another. I ran out of clearblue strips so I had to buy a new box today. I was just curious if the new digital reader and strip would read the same as the one I had been using. I used the same urine and tested using both readers and one I got a flashing smiley-which is the one I have been using and getting smileys on and the other i got a circle!!! The pregmate strip isn’t anywhere near dark what the heck??!!! Do you think the opk I have been using and getting flashing smileys on for days now could be defective?? (The opk I have been getting smileys on is in date and I just bought like 2 weeks ago too) I have no idea what’s going on!!!!