How to slide or scale loop cuts So there's a question I have regarding loop cuts. I don't really know how to explain it, but I know a tutorial which shows it at 00:50 in the video.

https://www.youtube.com/watch?v=rtO9maU709k&amp;t=78s

It's basically two loop cuts on top of each other, one stays put while the other is able to be scaled up or down etc. But when I try to do it, it doesn't work, it's like Blender tells me that I already have a loop cut there so the other one is not needed. 

Am I doing something wrong?

Thanks in advance.
I had 'Proportional Editing Mode' set to ON, which caused the problem. When I switched it OFF, it all worked as intended.