All posts showing on slider

Hi,

I’m having some issues with the slider function on my page – every single post I make is showing up in the slider section, even though I’m not making them a sticky, and I’m not selecting the ‘slider’ category when making them.

I’ve tried everything I can think of, but no matter what I seem to change, they’re all still showing up.

Is there anything anybody can suggest to stop this from happening, and to only have posts that I want to show up, or is it a standard feature on this theme?

Many thanks