Evap lines

I tested today at 7dpo, which I wouldn't normally do because I know it's super early still. I've never once, even with my first two pregnancies or any of the tests in the prior months that I've been testing since this may, had any evap lines on any test that I checked later on in the day. I obviously know that it's not reliable to check them later on and wouldn't go by the results anyways, but I just happened to notice on one of them that I took this morning that there was an EVAP line. Have any of you gotten evap lines before that led into a positive result at a later date? I know it's a silly question but I'm just curious if it affected the outcome.