Illustrator automatically applies a style when path is moved into a layer.

Hi there,

I have a layer where if I move a path into this group, then a a particular style is applied on top of the existing style automatically.. If I move the path to another layer, then that style is reverted back to what it was before.

I can't figure out what's doing it and how to turn it off. I tried to look for instructions online but couldn't find anything. Does anyone know what's happening here?

Thanks in advance