2018 D LSC.. Notch And Seperation?

Looking to hard to find something. I'll see something on my scope take the picture and I don't see it in the image. I realized that it is too minor to deal with. Most collectors on buy coins they can see at 10X. So then I realized I'm looking to close. On your coin it looks like die flow is causing the notch your seeing. So look for something larger as being doubled. I've been there. You just have to look more for the obvious, rather than looking to hard for too minor.

Note on the first image you posted? Note the glare. It is best not tp place a light that is too strong on something that you want to show. All that happens is that it is white as the sun. If you are showing something, let the light fall over the devices leaving what you want to show in the shadow:
IE:

The right amount of light, no glare, but note the shadow area. What he wanted to focus on, is shown in shadow. You know how sometimes a whisper is better than a scream..

Send me an email with images. I will see what I can see you need on your setup. The other day I was in a thrift store and found a microscope there that was perfect to use for coins. So I bought it as a back up. All that it need was the glass on the table top. (probably the glass will cost as much as the scope) LOL