Yeah it does sound like that's what she's doing
It's all normal, I'd only worry if it turns into chattering and it looks like their ready to have a fight.
We got ours as a group of four, now we think that Badger was the main sow of the cage so to speak, since Badger passed on the girls have been naughty and doing what your experiencing with your girls, every single day they argue lol, the smallest Cocoa rumble struts around the cage which is funny to watch. They are worse than the boars in my experience lol.