Can dye runs cause false positives?

N • Beautiful Nikolai born 12/29/17 👶💙 Lucca born 1/13/21🌻 In love and feeling myself 👨‍👩‍👦‍👦
I'm talking like a clear second line, not a squinter in person. Putting this poll up just in case no has time to comment on my post (which is perfectly fine!) Testing tomorrow again.

Vote below to see results!