From your photo, it looks like the same intake leak on both sides. Install the new O-rings, clean up the area and ride it, see if the brown stains reappear, doubt they will.
That's what I was thinking too. But it does seem awfully wet. When my intakes leaked it was pretty dried up. I'm not sure if that big Allen plug is to the water jacket or not. But after you change your o-rings if it still looks like that I would check that.