Clear blue HPT gives false positives??

Has anyone ever received a positive from clear blue's non-digital hpt, but got negatives on all other brands?? I think I got two false positives from this hpt. Three days ago, I took the non-digi test of this brand, got a faint line like in the picture. Then I took the digital version the day after and got a bfn. Yesterday I took the non-digi test again and got another faint line. Today I think AF is here. I don't think that a chemical pregnancy will still show up on a test especially when I was only 12 dpo. I had a CP before and usually I get a BFP on one day, and then several BFN leading up to AF. Does anyone else have this happen to them?