When there is many layers, scrolling via the scroll wheel of the mouse my mistake changes the volume of layers, when the mouse cursor reaches on top of the volume bar and then we move the scroll bar.
(Also make the layers compact or have an option to make it compact so we can make it smaller or bigger to fix everything to a screen)
Preferences ….
There is a setting avoid parameter changes at scrolling. Forget the name now, but you will find it 
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Preferences > Interface > Use mouse wheel for controls. Select ‘off’. This has caused me much grief and I’m very glad I found it!
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