Yashica GSN Light Meter Issue

I received a Yashica GSN four days ago. It was the first time that I had to pay brokerage fees and VAT for any camera that I have ordered from overseas. The seller listed it as refurbished with the POD replaced. The condition is very good with a clear lens and viewfinder, no corrosion in the battery compartment, and smooth focusing and aperture rings. There is a new foam seal inside the back door. The camera makes a loud "klunk" sound when the film advance lever returns to its position and not as it is rotated forward. I inserted a 4LR44 battery into a newly acquired adapter and loaded into the camera. It was in a low light situation when I partially depressed the shutter release. But instead of seeing the bright yellow arrow on the top plate, I also saw the red arrow. Both disappeared when I turned the aperture to f2 or wider. When I aimed the camera at daylight, only the red arrow appeared and it went out when I chose a smaller aperture. I can hear the shutter speeds changing. What do I do when both arrows appear at exactly the same time? They do not show one after the other as I slowly push the release down.