AutoZone Auto Parts

I went there on 08 November 2016 around 1845 right after work in my military uniform and was told that they cannot go outside to help customers when its dark and it'seems company policy. I was like I will respect that so I went to O'Reillys autoparts and they promptly provide me the service. But while they were helping me I saw 2 autozone employees outside helping 2 customers. So I went back in there and asked them why I was denied the same thing they were providing to others and they couldn't explain it. The only thing I could think of (and I hate to say it) is because I am black? I wish I could find another reason. But I know this, thank God that O'Reillys is right next door because Autozone will never a penny from me.