So in my quest to try new things while building, I've been putting together a frame and TIG welding it this time around. I have the front triangle together with the chainstays. The front came out great but it's the stays that I have an issue with. While checking the rear alignment with a wheel, I notice that it's off. When measuring, they are off by 1 mm. Not sure how I missed this when welding it, but I did. When looking forward directly from the rear, the rear wheel points a bit to the right. Please see the pics for reference.

Is my frame now a large paperweight? If not, how can I fix this? Am I totally hosed on this?

All advice is appreciated because I need some help. Thanks.

Brandon