signal shadow in console

[dj2wk]

hello, I installed yesterday sdr console in my laptop
everything works ok ,but I have a problem , that I had never befor:
every signal I hear and see in waterfall has a shadow on the same frequency, but its only optical,the stations they are sending I hear clear.
I mean its a problem I can solve with a setting in console.
Has anyone an idea what ca I do?
73 de Wolfram dj2wk

[KA1GJU]

A screen shot would be most helpful here!

https://www.sdr-radio.com/screenshot