Positive on dye test, Neg on digital

Hi everyone, I got my first faint line at 11 dpo and have been testing since. Yesterday at 14 dpo, day of missed period I got this nice line on frer. But today at 15 dpo after a 4 hour pee hold I got a negative on the digital frer. I have been drinking a lot of water but I don't think that should affect it, right? I cracked the test open and saw there was 2 pink lines inside. One is fainter than the other but it's there. Has anybody had the same experience getting a bfp on dye test and a no on a digital and still went on to have a healthy pregnancy? Thank you