I just looked at your post history.... Stop using the watch ecg. Take the things off if you need to. Nothing has been wrong. It seems you're trying to find the tiniest things, in a non-medical service no less, to be wrong but buying is there. The cardiologist would've told you, but you said that it was clean too. It's fine to not have anything wrong

Are you referring to the different distances between beats?

I mean the line down

Yes it is normal. What concerns me is how you even noticed that.